Until we get to macbook air levels of battery life (all day, heavy use) expect people to continue upgrades. We may be hitting the power ceiling, but we're far

Until we get to macbook air levels of battery life (all day, heavy use) expect people to continue upgrades. We may be hitting the power ceiling, but we're far off the battery life ceiling. (Ceiling as in consumer needs) Remember, not too long ago, a cell phone that lasted all week was normal.