Okay, so you're not actually running Windows 7 on your Android, but using this app and its PC client you can remotely connect to your desktop PC via WiFi or 3G from your Android.
Wyse PocketCloud Beta is a proprietary RDP engine to connect to your desktop computer from various mobile platforms. The Android version includes switches to turn various UI elements (wallpapers, themes, etc.) on and off to either speed up the connection, or make it look more like you're sitting in front of the box.
What's more, PocketCloud has been tested on the Motorola DROID, HTC Evo 4G, HTC Hero, HTC Droid Incredible, T-Mobile G1, and Nexus One, which means most phones running Android 1.5 and up should work just fine.
The remote computer must have Remote Desktop Connection enabled and the Wyse PocketCloud Windows Companion software installed. It supports 32-bit and 64-bit OS's, including
- Windows 2003 Standard/Enterprise (SP2+)
- Windows 2008 Enterprise
- Window XP Professional and Media Center Edition (SP2+)
- Windows Vista Business/Enterprise/Ultimate (SP1+)
- Windows 7 Professional/Enterprise/Ultimate
The Wyse PocketCloud Windows Companion Software requires the .NET Framework 3.0 (or later) and some other Microsoft libraries that the installer will attempt to download and install automatically.
Of course, you're not going to be able to watch your Media Center shows or do any kind of media streaming over the remote connection, but being able to access your work (or home) computer's desktop, files, and printers from anywhere you have a data connection is very, very cool.
See Wyse's PocketCloud for Android page for download links to both the app and the desktop companion.