webplayer is interesting for small game and puzzle game but not fitted for an fps or an rpg. So maybe many developers claim doing innovation instead of graphics but for me even if unity has great tool I haven't seen a single game capable of doing what the ue3 showed many time in many game ( gow, batman, bioshcok etc ..; )
I only see iphone dev. I've to say to all iphone fans, ther eis no real point doing game on iphone since there is too much pollustion on apple store to get your game sold.

So don't say unity is best because it has really specific features like webplayer, but don't support shadow for example.