brand of TV for 4k viewing. - DirecTV

i have a UHD tv 4k Seiki tv.
if i get a 4k receiver box from Direct TV
am i able to watch 4k programming.
or do i need a brand of TV as Sony Samsung or LG.
i was told onlt these 3 brands work with direct tv. this made no sense to me

This question, "brand of TV for 4k viewing.," is about DirecTV channels, programming, equipment, and sports.