From what we've seen of Windows 7, we've got multi-touch features and a new taskbar. Obviously because of the new way that Microsoft (*ahem* Sinfosky) is keeping the Windows family of products close to its chest, we don't really know what's going on with it, or what it can offer. The main problem, from a development point of view, is because we don't know the core API's and the "power of Windows" yet, development becomes increasingly difficult. Needless to say, Windows 7 is a good couple of years away at least, so there's plenty of time to worry about it. Yet those in university at the moment who learn Java, C# and .NET3 may be ostracised from the employment market...