My background is more on math competitions, but all of those things are essentially speed contests. The skill comes from solving hard problems within a strict time limit. If you gave people twice the time, they'd do better, but time is never going to be an issue for a computer.

Comparing raw Elo ratings isn't very indicative IMHO, but I do find it plausible that in closed, game-like environments models could indeed achieve the superhuman performance the Elo comparison implies, see my other comment in this thread.