Comment by varenc

The old ATV 4k model already supports 4k at 60fps. The only improvement is that it supports HDR 4k content at 60 fps.

From the old spec page [0]:

   H.264/HEVC SDR video up to 2160p, 60 fps, Main/Main 10 profile
   HEVC Dolby Vision (Profile 5)/HDR10 (Main 10 profile) up to 2160p

And the new spec page [1]:

   H.264/HEVC SDR video up to 2160p, 60 fps, Main/Main 10 profile
   HEVC Dolby Vision (Profile 5)/HDR10 (Main 10 profile) up to 2160p, 60 fps

[0] https://support.apple.com/kb/SP769?viewlocale=en_US&locale=e...

[1] https://www.apple.com/apple-tv-4k/specs/