Not a scientist, but my first assumption would be that everything on earth, but also earth itself will double in size, knock ourself around our nice orbit around the sun and kill everyone either flashly or coldly.
Ignoring that problem, or applying the effect to the entire universe, probably not much would happen.
When a new game is released I usually check if it’s steam deck compatible, if it isn’t for no specific reason (like, a 2d platformer, I’m not going to expect a high fidelity 3d game to work) I’m way less inclined to buy it. The market is there and really should be picked up.