If Google starts renting games it's competition for other mass market paradigms. Buying digital downloads will be niche. I have a balls to the wall gaming PC and plenty of consoles, however, I don't want to spend 90$ every other week to see the hot new game everyone is talking about. $5 for a weekend rental is great for me (matches blockbusters old $4.75 weekend rental fee). A little lag won't be an issues especially considering most new games are story driven cakewalks anyway.