I've been playing Grid games for a few weeks, with good results providing my internet connection is not saturated. It's easy to imagine game streaming being the way of the future.
While the Grid catalogue provides a good selection of games, most of them are older titles. Games like the upcoming Fallout 4 or Star Wars Battlefront make it near impossible for a gamer to avoid buying a console. Does anyone think we'll start seeing brand new blockbuster games being released on Grid?
You have to take into account that it is currently free. Newer titles will come once the service becomes paid.