It took Cook ~7 years to get Vision Pro out the door. Refreshes? A year or two is usually fine. Entirely new products, not so much. This home stuff has been cooking for about a decade and you can bet HomeView was there in the beginning.
Took 13 years for Apple Silicon, 6 years to design an Apple modem and it probably will take 3 to 5 years for in-house memory if Apple chooses to do something about the memory cartel, the Vision Pro probably is two generations away, and Apple is probably 2 generations M8 away from with having GPUs beyond the Nvidia 5090, in tech worth while iteration takes time.