The 7D mk I will still be the only 7D in the range in 5 years but every 6 month interval until then there will be a rumor and the forums will say you're stupid for not waiting for it. /end sarcasm.
I do do think full frame will get cheaper and more common. I also think we will probably see medium format digital reach 5D line price points in the next decade. MF backs are now in the range of what rhe original 1D series cost. When we get to the day you can buy a new FF camera for 500 I think the demand for crop will be less but not gone, apsc became a real popular film format before digital cameras were multiple megapixels for under $300.
But I still don't buy into the claim that film is dead.
I'll also mention there was a time the goal was the smallest cellphone possible, now much of the market tries to make the smartphone with the largest screen.