Windows 7 - Is Vista's end near?

With all the latest excitement on whether we would get a new version of Windows in a year or so, Supersite for Windows, has a few screenshots of what may end up as Windows 7.

Currently as mentioned in the page, it seems to be Vista with a few things added. It is still in design stage and it will take quite a while before they clear up on what new features will go in and what will go out.

But the problem with a new version coming out in a years time, is more to do with applications. For example, Lotus Notes just added support for Vista and they still do not support 64-bit (Personal Experience :( ). There are quite a lot of applications that need to start supporting stuff like 64-bit and UAC. With a possible new OS in a year or so, how many of these applications would be able to keep up??