The point of a tool like 1Password is that there is no reason to create memorable passwords. The tool does the work and all the user has to remember is the master password. For that, the diceware method is exactly what Agile recommends.
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.