I bought a 42" Hisense Roku TV for like $120 with no prior research from Walmart a few years ago when my old plasma finally passed through to the great beyond. The interface was so clean and pleasant to use and there aren't ads stuffed everywhere.
Went to a friend's house and he had a Roku Express player and his was littered with ads and the whole UI was Christmas themed.
Moral of the story is pihole is OP.
That works until the ads are hosted from the same domain name
Then my little Celeron junker will also double as a router. Probably going to have do that anyway since YouTube on PS4 and Roku both serve adds from (what I assume are) hardcoded IP addresses.