There was a rumor going around that PS5 dev kits had gone out earlier this year, but I'm not sure if that was confirmed or squashed or what. I was hoping this gen would go on longer, at least. The last one went on for a long time and I think we got the most out of it especially with the 360. The technical leaps don't seem that huge anymore (the graphics jumps already aren't as impressive, although there is a noticeable different), and since games take so long to make and support these days it just doesn't seem like the PS4 and Xbox have had enough time to shine and get the most out of their hardware.
Again though anything is possible and the devs would obviously be the ones most privy to that info. To be a fly on the wall in those meetings! I so envy the people whose jobs are just to create these worlds and the lore (not necessarily the programmers, though, haha).