html5 is not for games, but more for appliations really and you need to host it yourself. Its require more horsepower for that.
And yes since iPad 3 have same cpu, but double or such better GPU, that could ave some limit in my game, Greedy Mouse. I might need to revert to 30fps and/or disable the colored font (some devices not like colored polyvectors). 30fps is a no problemo in a game like that anyway :-D (I deploy that in most devices anyway, except iPad 2 and desktop machines).
So hence we want retina support, if not working directly :-D. But the game is first finsihed in around 2 month, so no hurry for me.