Software Conflicts

OK I've installed Vista and I like the interface. I've had a few windows
products from win 3.1, 95, 98, 98se, me, 2000, XP home prem, Xp media centre
now Vista premium.
When can I expect programs from other software companies to get up to date -
Real arcade, Activision, etc etc.
I use my PC as a family PC but so many of my bought software doesn't work
that it has become a wordprocessor, internet browser and TV. I want my
programs to work or at least be able to download a patch to make them work. I
wouldn't mind even buying a new vista version of an XP program.
I assume that microsoft does have a technology exchange with software
companies. When can I expect a flood of Vista compatible software so that I
can assign my XP software to the bin, or am I going to have to re - install
XP media centre - partition my hardrive - install Vista again and choose
which Op sys. I would like to use?