Nothing in these links suggests 1080p60 support. That will never happen.
Almost all content is 24fps. The Pi2 can play some low bitrate 1080p24 content, and most 720p content.
The Pi3 can play higher bitrate 1080p24 content (and probably 1080p25/1080p30, but these are much rarer).
There are additional optimisations (e.g. zero copy) in the nightly/Krypton builds which brings the performance up a bit more. The goal is to get almost all 1080p hevc files playing well on Pi3, but work is still ongoing.