I'm planning on incorporating it into my next home design; we already own the land and have selected the building site. If fedgov wants to give me a tax break for it, I won't complain, though I'll install it either way.
I think a REAL help would be to do something akin to what they did with digital satelite dishes which the feds gave immunity from local ordinances. IOW they could not ban digital dishes the way the locals (at the behest of cable companies) banned satelite dishes.
So a law is passed prohibiting of banning solar cell systems.