I'm hoping for video out support for my MBP (with little hope). I downloaded this, then realized that its been months since I descended into Windows. Makes you really question if the 20 GB for Vista are worth it. Probably not, but I've got a class coming up that requires .net IDE, so oh well.
I use Visual Studio all day long from Parallels and have been doing so since the beta versions of it. Works great, I put the VM files on an external drive and then don't need to waste my MBP disk space with Windows.
Though if you want to play games you still need Bootcamp. But I have Oracle, SQL Server, Visual Studio, and a host of other apps on it and it works great. Plus you just backup the VM files and if all goes wrong in Windows you just revert to a previous backup.
If all you're using is Visual Studio I highly recommend Parallels. You could then edit your source files from OS X if you so desired.