Not quite "moved to".
Yes those who have already built S1600s to test the water are now releasing S2000 spec cars expected to replace the WRC class.
Rallies will ahve S1600 AND S2000 entries as per the regs ...
eg Art. 9. 2007 FIA CENTRAL EUROPEAN ZONE RALLY TROPHY
9.1 Eligible Cars
The trophy will be reserved for Touring Cars (Group A), Production Cars (Group N). S2000 and S1600.
Just as we currently have the two will be on events together, just unlikely that an S1600 will win outright ... though we may be surprised on some events
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'