My Apple TV is now just for playing iTunes purchases. As an app platform it's frankly a dead platform. My PS4 has a better selection of apps (I'm talking big providers here, not fireplace apps and other detritus) and crucially apps are just better on the PS4. Why, for example, is YouTube so awful on the Apple TV? It looks like an MS-DOS programme from the 1980s. Even Netflix is worse on the ATV than on the PS4, and as for Now TV (somewhat akin to a UK version of HBO NOW), well the Now TV is beyond abysmal. It's almost unusable, whilst the PS4 version is galaxies ahead in every way.
And as a Brit the poor iPlayer app on the ATV is the final straw. The iPlayer app on £30 Roku stick is miles better.
Oh and Siri search is still US only, except for Netflix and iTunes. It can't search any of the (small selection) of UK apps on the ATV. Farcical.