I've been looking around online at home theatre receivers because I'm thinking of upgrading mine. I see lots of talk about 4K and 4K "Ultra". Are these just buzzwords or is it actually worth the money to purchase a 4K unit?
The concept of 4K technology is something you will hear all around you but it comes down to how much you want to spend on a home theater. As far as I know, the best pictures are those from 4K Blue-ray discs using a 4K Blue-ray player. There is more picture clarity, so to speak.
Unless the content is being delivered in HDR, you're not going to notice much of a difference. As the poster above me stated, I would wait for the content to catch up to the capibilities. Until then, stick with 1080p.