This again?! With Re's I think there is 0.000001% chance of props adding VST compatibility. Hard Reason nuts don't want it for the stability reason. But with Midi out there are now work arounds to get VSTs into Reason.
But I for one feel it's now unnecessary so long as the Re's keep releasing at a decent rate and demand for them remains high. In a couple of years they'll be almost on par I think.