Strange headline. It has a new processor, different RAM, better radios, bigger battery, better camera, better flash, but "no major internal design changes"? What would constitute a major change then, unless the writer is simply talking about the layout of black squares of silicon.
Not necessarily. I see this as incentive for developers to begin adjusting for 64 bit today so everything will be ready in the future. Apple did a great job transitioning the Mac seamlessly from 32 to 64 bit. Microsoft didn't do it so smoothly with Windows.