[nimrody]

Even the hardware manufacturers expect big improvements in every release.

Integrating a new release, testing and verifying correct operation of a cell phone is a long and costly procedure. This is why many phones still don't have an update for 2.2.

So cell phone makes would prever big upgrades with many new features -- but release infrequently.

The "release early, release often" mantra just doesn't suit this type of market.