Similar to the web version (upper left) one can choose source which then filters channels on grid.
That would be useful if added to app(s) especially Apple TV version…if one quickly wanted to filter channels as source first then down left side for hd, sd , movies etc as a refinement….
Sometimes with all Pluto channels and then TVE and customs it’s can be a bit slow scrolling up down going thru all the list ( yes I use favorites ) ..even tried renumbering recently… but this might be very cool…
Example Pluto like say comedy and Carson and bond check as favorites but if you have abc nbc and so on,…..now think…
Change source..favorites boom just the favorites from that source there…
Food for thought…..
And sure it would be nice if while scrolling on grid a 1/2 or 1/4 screen was default (upper or lower left or right) so you can watch will scrolling
(Pip) is sort of a workaround and I use it on iPad and iPhone but with Apple TV it’s a bit more cumbersome