What features will iPad 2013 have?

Hey guys, I'm late to the iPad game here. Have an iPhone, Mac mini, MacBook Pro, but never really thought about buying an iPad. Nevertheless, my wife wants to get one for me and I don't know whether to get the one that just came out, or wait for the next one.

What features do you think will come with the next version? IGZO display? Complete case redesign a la iPad Mini? Will it be a major upgrade from the current version? Will it be worth waiting for??

Getting this one and selling it to upgrade to the next is also a possibility. Thanks for the input.