I think it will be much faster this time. I remember (perhaps incorrectly) that around the time PS3 and 360 were releasing, a 1080p was still a VERY new thing. They were also much more expensive than SD tv's and it took me a LONG time to get the money for one. I was on a small Samsung 720p tv most of that gen because of this.
4K tv's have been out for a while now and can be had for VERY cheap AND with HDR. There's likely a larger percentage of TV owners with a 4K tv already at this point in the cycle than there were people with 1080p tv's this point in the PS2>PS3 cycle.
I think it's actually a good thing that 8K content and tv's are still a ways off because it means PS5/XB can focus on making use of 4K.
4K tv's have been out for a while now and can be had for VERY cheap AND with HDR. There's likely a larger percentage of TV owners with a 4K tv already at this point in the cycle than there were people with 1080p tv's this point in the PS2>PS3 cycle.
I think it's actually a good thing that 8K content and tv's are still a ways off because it means PS5/XB can focus on making use of 4K.