Game modifications support
The one big thing that separates PCs from consoles in gaming is the modding support. With modding you can turn average games to awesome. Games like Beat Saber and Pavlov are already prime examples how a mere mod-support can carry a game.
In VR we still don't have a super wide library of long and fantastic games, which underlines the need for user generated content.
Oculus Quest should break the barrier of what is possible and bring all-in-one devices closer to PCVR.
1. Technical support for game modding.
2. Simple user interface for mod browsing and installation.
3. Basic user reviews and rankings.