Srdjan, it was possible to bring a FPW app into VFP and make it run, but it didn't use all the new UI features that users expect from a 32-bit app and it didn't work as well with remote data as it should.

Similarly, a NET app written in 2003 using untyped datasets and Winforms will still run bit it won't offer the cool features of xaml or Silverlight and the app will just be crying out to be rewritten for the EF.

That's the joy and hurt of NET IMHO: MS keeps introducing really excellent new features that are too good to let pass by... meaning there must be incredible pressure to keep tweaking existing code to keep it up-to-date. Which is why I would have thought that the idea of a 4GL that compiles the same form to winform for those who need it, xaml for those who need it and Silverlight2.0 for those who need it and compiles to use the latest greatest data techniques as well, should be exciting to everybody here.