Many consoles come with one built in. We just use the PS5.
I'm not particularly into buying tv shows, but there are definitely quite a few movies out there that look a lot better on a 4k blu-ray than 4k streaming.
I got a PS5 with a 4k blu ray player but have yet to put a disk in it since many films are simply not available. Tried to find Lawrence of Arabia but it seems completely unavailable. Maybe the format is great but lacking lots of content.
So it looks like they finally released it in June this year, but only as a $120 limited edition. Before that it was only available as part of a $290 Columbia Classics box set. Think I'll pass.
It was actually released at a normal price (I think I paid $20 for it), but yeah, didn't realize it was a limited release that's now going for big money.
(The limited release thing is annoying, but... it's a niche market, and one of the ways they get people to buy things at full price instead of waiting for 50% sales, so I get it.)
I'm not particularly into buying tv shows, but there are definitely quite a few movies out there that look a lot better on a 4k blu-ray than 4k streaming.