The best thing that we can do is to get rid of Vista and don't give any kind of support to it.
If people that make Wndows applications stop doing anything that is specific to Vista I want to see what Microsoft will do!
This police will have no negative impact on software makers, first at all it must be remembered that most of Windows users still use Windows 98 and not everyone has a 4Ghz computer, most of the computers used are old and some very old.
If we make some software that doesn't work with Vista we will lose very little, but if our software doesn't work with Win98 we lose a lot.
We can mantein this police for five years and then revaluate it, meantime many Win98 users should have migrated to XP, that also would be something old and the old machines will be 4GHz computers.
So if our software doesn't work with Vista, bad luck for you and better upgrade your computer back to XP

Stupidity also evolves!