Only two years ago Apple unveiled their new lineup of Intel-powered laptops, but for the most part the biggest changes were internal. The new laptops bore a strong exterior resemblance to their G4-powered predecessors, but all of that could be nearly at an end. Rumor has it that the next updates to Apple’s portables are going to see some major styling changes.”Of the two, the 13-inch consumer MacBooks will undergo the most significant metamorphosis, shedding their plastic enclosures for ones constructed from