I just upgraded to the iPhone 4 today. I can definitely see a huge difference between apps that are upgraded for the "Retina Display" (crystal clear) and those still running at the lower resolution. Now I was just about to buy two games: Plants vs. Zombies and Worms. I noticed that both of these games have "HD" versions for the iPad (since when is 1024 pixels wide HD? :-/ Besides the point though...). I don't want to buy either of the game if they will be the old iPhone 3GS resolution. Are the regular iPhone versions of the games updated for the "HD" of the retina display, or can you buy the iPad version, or can you simply not get an "HD" version of either for the iPhone? Thanks!