>>> That is......... assuming the next and great OS from M$ is compatible
>>> with VFP 9.0 SP2 + Sedna. If NOT.... then we are compatible till THAT
>>> time only. Probably 5 years MAX.
>
>And assuming that there won't be a Vista Security Hotfix that disables something we really need to run VFP... ;-)

Seriously speaking, virtualization made the OS problem gone nil for legacy applications. Virtual PC is now free. The most terrible situation can be the need of an XP license, but even that I'm not so sure about.