I have a PS5 and still use my 1080p TV with it. I don't see a reason to upgrade when mine still looks and performs beautifully. It's an old samsung but the colors on it are amazing for a LED. If I want to upgrade to 4K I see the models people suggest and that's too much for me so maybe in the future once mine goes bad I'll actually bite the bullet and do it.
On topic I bought 3 cheap indie games on sale from the eShop for their lowest price I wanted to recommend (spent just under $10 for all 3)
Kaze and the Wild Masks $3.99 is like Donkey kong country if you play as dixie the entire time. Very fun and probably my favorite out of the 3 I bought. Graphics are super clean as well looks something out of the SNES era.
MARSUPILAMI - HOOBADVENTURE $1.99 is another DK like game but more in line with tropical freeze. Played a little bit and I like what I've seen so far. The main character was also a cartoon in the 90's I remember which is what got my attention when I saw it.
Grapple Dog $3.74 is a fun little platformer that reminds me of bionic commando with the grapple ability you use. Controls feel really tight and the graphics are beautiful. Feels like something out of the GBA era.