Are you from 5 years ago?
There has been a huge indie golden age in recent times & I'd argue we never had it as good as now in terms of innovative games.
Totally agree, try Braid, Portal 1 & 2, Limbo, Minecraft, Karoshi, World of Goo.. Outlets like xbox live arcade and ios app store make it easier for indie developers to reach a large audience.
Some people ignore indie games, sadly... But you've just mentioned them, so perhaps this person will take a look at them and see what they've been missing :D Because yes, indie games are awesome.
With time, It was becoming more and more difficult to find innovation. Until a point in which I mostly lost interest. Except for some occasional incredibly polished games based on established gameplay mechanics, or the rare little innovations that pop up somewhere.
I think that what may open up the space for innovations again, are new interface paradigms, like immersive virtual reality, or AI. What stops these innovations from being realized, are non-viable budget requirements, and a market flooded with worthless games.