Microsoft was smart to admit that Vista could have been better and they have made up it for it and them some with Windows 7. Windows 7 feels like a big upgrade for Vista users but it's going to be an even bigger upgrade for Windows XP users. The majority of Windows users are still running XP but I believe that tide will finally start to shift with Windows 7. It's a good sign that it just shipped today and yet the market share web sites are reporting that it's already got 1.5 to 2% of the market. Obviously those are all users running the pre-release but that's an even BETTER sign. Microsoft has really focused on the right things with Windows 7.
There's some cool stuff in Windows 7 but we need to know what is most important to you. If there are Windows 7-specific features you'll like to see natively supported in REALbasic/REAL Studio, make sure you request them using Feedback, our new system for reporting bugs and requesting features. And if they are a high priority for you, make sure to use Feedback's ability to rank your cases. That will help push up the priority.
If you're a REALbasic/REAL Studio developer running the IDE on Windows XP, upgrade to Windows 7. The memory leak that causes the IDE to take longer and longer each time you run your project does not occur on Vista or Windows 7. Not to mention, the user experience on Windows 7 is far superior to XP. So upgrade to Windows 7. You will be happy you did.