I'm sure both Vive and Rift will have plenty of software support. Only thing I'm worried about is room scale games if Rift and PSVR don't work, as I doubt many developers will satisfy themselves with just the Vive userbase.
But it will be the shit in gen 2 for sure.
Which is why Touch coming late and being optional and room tracking officially unsupported is potentially holding back the VR market as a whole. Hopefully enough Vives will be sold to keep the software going.