8K decoding needs HW acceleration, unless having 8-16 cores with AVX-512.
Yes, but that's way out of budget for most consumers.
Actually not really, Lunar Lake chips with Xe2 graphics have VVC decoding in hardware which can do 8K.
https://en.wikipedia.org/wiki/Versatile_Video_Coding
They were likely saying that 8K displays are way out of budget for most consumers.
Where I live, we have 50 inch 8k TVs for 180 USD.