从xp升级到win7，从底层到界面都经过了翻天覆地的变化，但使用电脑的方式却没有什么改变。
win8是基于win7的升级，却正在颠覆桌面计算机。
如果你还不太清楚，Windows 8大概有这几项改进：支持x86与ARM平台，整合传统UI与Metro UI（Windows phone 7的界面），所有界面都设计为支持触屏，内置app store等。
开发者预览版下载：
http://dev.windows.com Welcome to Windows 8 – The Developer PreviewRate This
Steven Sinofsky
Steven Sinofsky
Microsoft Corporation
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View Profile13 Sep 2011 9:05 AM
If you’ve been following this blog, then you know today is a big day for the Windows team. At the BUILD conference we are about to preview Windows 8. There’s a ton to see in the product and so we’d really encourage everyone to check out the available streams on
http://buildwindows.com, where we will webcast the keynote. The BUILD conference this week is focused on developers and hardware partners, and there are over 100 sessions (all of which will be available from the link above within about a day of the scheduled presentation time). In that sense it is good to keep in mind that today is the launch of the developer opportunity for Windows, not the launch of a product (and certainly not the launch of new devices).
Windows 8 represents a reimagining of Windows from the chipset to the experience. Since this is a week focused on developers, we also detailed the bold underpinnings of the re-imagination of the Windows platform, tools, and APIs. We will show off the opportunity to build applications for all of the customers of Windows 8, no matter what type of PC they have—from tablets to laptops to convertibles to desktops. We will show the brand new tools that allow you to code Metro style applications in HTML5/JavaScript, C/C++, and/or C#/XAML. The investments you have made as developers in all of these languages carry forward for Windows 8, which lets you choose how to best make use of the Windows 8 system services. We talked about Windows 8 being a no-compromise OS for end-users, and it is also a no-compromise platform for developers.
Many are interested in Windows 8 for ARM processors. Everything we showcased today at BUILD also runs on the ARM-based Windows PCs being created by ARM partners and PC manufacturers. Windows 8 running on ARM will ultimately be available with ARM-based hardware that you can purchase. ARM requires a deeper level of integrated engineering between hardware and software, as each ARM device is unique, and Windows allows this uniqueness to shine through. The new development tools enable you to start today to build Metro style applications that will seamlessly run on x86 (32 and 64 bit) or ARM architectures. Even if you use native C/C++ code, these tools will enable Metro style apps to target specific hardware if you choose. As new PCs become available for testing, PC manufacturers will develop seed programs for developers.
You probably want to try out the preview release—and you can. Starting
later tonight you can download the Windows 8 Developer Preview. This includes a
64-bit (x64) build with development tools to build apps, and a
32-bit (x86) or 64-bit (x64) build without development tools. The releases also include a suite of sample applications (please note these are merely illustrations of potential apps, not apps that we intend to ship with Windows 8). The ISOs are linked to from
http://dev.windows.com.
Upgrade from Windows 7 installation is not supported for pre-release code; only clean installs are supported. Reminder: this is a developer preview release and is not meant for production. It is not a beta release. We will be updating the release with various quality updates and drivers over the coming weeks/months just to exercise our overall update and telemetry mechanisms.
We’ve got a lot more blogging to do. So stay tuned. This blog continues to be a big part of the development process. Now we have a lot more shared context, and so we expect folks commenting on posts to be running the Preview so we share in the context of the release. Let’s keep comments focused on the topic at hand and we’ll pay attention for potential new topics. We know there will be a lot—that comes from reimagining a product used by a billion people!
--Steven
UPDATE (10:10 am PST) - Slight correction inserted
above.
UPDATE 2 (11:30 am PST) - I bet a lot of you heard about the machine that attendees at the conference received (this was a limited production run and is not available for sale). It is pretty cool. Keep in mind, Windows 8 is a no-compromise OS, which means you do not need to have a tablet or touch-capable machine to experience Windows 8. Mouse and keyboard are first class in the whole experience. If you are curious, a little later today we will post some of the touch hardware we have experienced in our labs so you can see what existing Windows 7-based hardware experiences we have. Keep in mind there are no PCs designed for Windows 8 yet—that’s a big part of the BUILD conference—gearing up for newly designed Windows 8 PCs of all types.
NOTE: The preview build does not include every feature shown this morning. Shown but not in the Developer Preview release include the Windows Store, Windows Live Metro style apps, and some of the user interface features. The focus of the preview is the API and development tools for building Metro style apps.
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