I think if they release Scorpio with some kind of VR/AR compatibility that has a killer app, that could bring them back. But I doubt that happens, especially at a decent price point. I suppose Steam integration could have a pretty big effect, as well.
If they come out at E3 and just talk about how powerful Scorpio is for the majority of the presentation I think it's a sign that they've essentially thrown in the towel.
Owner of PS4 Pro, Xbox One, Switch, PS Vita, and 3DS