Apple announce a launch – what could it be ?

The fact that Apple have announced an event on the 7th of March makes me wonder should I reconsider what to wish for my birthday. Could it be the new and highly anticipated Ipad 3 ? If so what can they do to make an already must have into a must have even if you already have an Ipad 2 ?

Performance and screen display have  been the most suggested improvements but i suspect they will want to throw in something else to make the new product shine above the other wannabee ipad killers.