And the people that cant run programs like ACT wont upgrade, simple. Most people that run ACT still run it on Windows 2000 anyways and didnt bother to upgrade there machines to even Windows XP.(its funny that you bring up that program anyways since it is/ and has been one of the buggiest fatabase programs I have ever come across)
It will run Windows Video Games and run quite a few programs, the list continues to grow. Alot of people simply havent even bothered to try to run older programs in Windows XP mode or other modes. I have yet to find one single program of mine that will not run on Vista, not one.
So no, not game over, game beginning.
For whatever reason (e.g. failure to grasp, denial, personal blinders, etc.), you aren't admitting what it means that Windows Vista can't run a mainstream Windows 2000/Windows XP program like Peachtree Accounting's "ACT!"
And what it means is that Windows Vista isn't backwards compatible with Windows XP (or with Windows 2000, or with Windows NT, or with Windows 98, etc.).
This fact has *enormous* implications for proprietary software...in other words, the software that each business writes in-house to run their operations.
Knowing that Windows Vista isn't backwards compatible with mainstream XP software like "ACT!" means that any company that upgrades company-wide to Vista en masse is risking *all* of their deployed software.
To put it simply, everything that they've written in the past may not run...or may run with bugs in unexpected places.
Proprietary software, after all, typically complies with fewer standards and seldom ports as easily to new OS's as does commercial software.
So when a mainstream commercial package like "ACT!" fails on Vista...well, that pretty well sounds alarm bells for all in-house tech deployments.
Vista isn't backwards compatible. Companies looking to upgrade to Vista are facing new error checking tests at the least, and potentially new software re-writes from scratch at the most...
...but those re-writes wouldn't even offer new functionality. Companies would be spending new money just to have what they once had under XP and Win2000.
Well, that's not going to be very attractive to the average CIO. Why spend money to get what you've already got?!
Thus, Vista's lack of backwards compatibility is a hurdle for every corporate software salesman to overcome.