Agh!! I cannot believe I forgot mention of the media player in my previous posts Yes, yes, yes the media player needs an overhaul since it is a very important aspect of mobile devices for many people. I love what Google did with "Gallery" and it would be nice to see a flashier and more functional UI for the media player.
To address some of your other concerns, I will agree with xguntherc on Copy/Paste. Yes, Android obviously has Copy/Paste functionality in most parts of the OS... but it is somewhat clunky and annoying to use. I would absolutely love to see something as simple and easy to use as the iPhone in this regard. You cannot fight on this aspect of the OS going to iPhone, hands down. Their implementation of selection and copy/paste is very nice and works wonderful on touchscreens.
Finally, multitouch in games has nothing to do with Google/Android. This is all up to the developers of the games at this point. (as far as I know)