VFP will be supported until 2015
After this how many years do you guys estimate it will still live

5, 10 or 15 year

It is not likely to 'die', just in the same way that there are still Cobol apps out there, Fortran apps, etc.

There will still be companies with thousands and thousands of lines of running VFP code. Some will get converted to another platform, and some will not.

But all the major product trends have been going down for years, and will continue to do so.