OS v4.5 will include GPS that drives your car for
you. Also, as an added feature (thanks to an environmentally-conscious RIM), it will also plant trees during the evening hours when idling for more than 20 minutes (no Birch or Redwood compatibility yet, though; expect that in v4.6). Expect this OS to be released on the up-and-coming BlackBerry 88,000,000, which will include a small but powerful flamethrower, a laser cutter, and a deep-fryer.
Oh, and there will still be issues with ringing volume.