With mobile devices, lighter is always better. Unfortunately, the Surface Pro weighs in at a hefty 2 pounds. Light for a laptop, yes, but tubby for a tablet. By comparison, the Surface RT and the fourth-generation iPad both weight about 1.5 pounds (the iPad is a little lighter). If you carry a mobile device around all day -- say, in a hospital or on a factory floor -- the Surface Pro may get heavy in a hurry. Hopefully Microsoft will trim the fat from future Surface Pro models while retaining (or boosting) its processing power. Oh, yes, a longer battery life would be nice too. That's not too much to ask, is it?