Unfortunately the Iris Pro comes with a much higher TDP, which means significantly shorter battery life and higher heat dissipation needs than all the other Has

Unfortunately the Iris Pro comes with a much higher TDP, which means significantly shorter battery life and higher heat dissipation needs than all the other Haswell i5/i7 parts (47W vs 15 or 28). You won't find it in an ultrabook due to the heat, and you won't get the battery life benefits Haswell brought over previous architectures. The non-Pro Iris part is the better compromise IMO; you can find it in the thin-and-light form factor, it's much lower power so you can still get 6-8 hours of battery life, and it's still fast enough for most new games.