Chances of it running at 60fps 4k is next to none. And what about people on 1080p TVs? Not many people own 4k TVs, and if they do somehow get games at 4k 60fps (which even PCs can't do unless thousands are spent on them) what will the graphical quality be of said games? Low? Somehow even lower than low settings to achieve 60fps? Cause if that's the case, this sounds like a Scorpio would be a downgrade to anyone not on a 4k TV as you'll be running games that have worse graphical settings than those on Xbox ONE at the same resolution on your TV.
Though on a side note, if they reduce console 'generations' to 4 years instead of 8, that could be great for gaming as a whole.