[enraged_camel]

Haswell will fix what? The battery life? Because that's a no. You might see some marginal improvement, but that's about it.

[wisty]

The main difference between the RT (10 hour life) and the Pro (4 hour life) is the CPU, isn't it?

A peak 17W vs 10W draw is a pretty big difference. And that's peak power; Haswell may be even better at idling. We might see 6 or 7 hours on the next Pro (wild guess).