The Sandy Bridge update to the Air line has been enough to make some feel the lightweight laptop is ready for prime time (I'm convinced, personally), but it's still not enough for some. MacBook Pro users are accustomed to more storage, more screen real estate, and a greater number of ports. If rumors are to be believed, the best of both worlds might be on its way, with Air-style design making its way to the Pro line. The sources are obscure, referred to only obliquely ( MacRumors "has learned" and TUAW is "hearing"), so take this with a grain of salt. But even sans source, it makes sense, while leaving room for plenty of speculation. What will the compromises be?