I think what they MAY be referring to is the resolution/quality profiles. When set to e.g. 4 Mbps, with H264 it transcodes down to 720p, while with HEVC even 1080p would be ok.
But IIRC the profile always only referred to the bitrate and the resolution was only a guess.
So the question is, will HEVC maybe transcode to 1080p within the 4 Mpbs quality profile?
What I can tell you is that the resolution/quality profiles are on our radar. Changing it is going to be non-trivial and we need time to figure out how to do it right.