Windows 8 enterprise tool suggestion
In our organization, we are almost fully switched to Windows 7 x64 and Windows 2008 R2 and are very happy with the performance and compatibility in most cases. Before switching, I generally wait to ensure the hardware and software we use will be fully supported. If there was a free tool you could run on your system to do a simulated install - telling you what potential missing drivers you would need and performance you are likely to get, I think I would feel more comfortable switching. At home I run OSX, they tell right out if your system isn't going to support the new version or not - since the Windows world is so much more diversified, I think they need a tool to do an assessment of your system.