Of all of these features, the one I most want to see greater support for is Web Workers. I think this could be a huge boon for a variety of interesting client side work, and a nice complement to web sockets...
What are the use cases for web workers in mobile environments? I can't see any good reasons to be using up the viewers battery and limited prrocessing power that way other than for (maybe) backgrounding some of the processing for a web app.
On a non-mobile note: If you use my computer to run your map-reduce job without asking me first; I don't like you.
