Thinking of getting a 4k tv..

Hi,

Currently have Vu+Solo2 on HD tv in the UK. Thinking of getting a 4k tv but would appreciate any advice. In particular:

1. If I download 4k films TPB, what's the easiest/cheapest way to play these on the tv? Can my Vu+Solo box play them? or would I need a new Amazon firestick?

2. Bearing in mind currently no UK broadcasts for 4k (and barely any on other sats) is there any advantage yet in buying a see Vu Solo 4k box?

thanks/Merry christmas