The "battery running out" argument is pretty lame. Every airplane I've been on for the past couple years has had a power outlet in the seats. And I can definitely "tell the difference" between 1080p and iTunes HD-in-name-only on my 27" iMac and the attached 30" studio display.
Your implication that all seats on airlines have power outlets is fallacious.Your talk of a notebook needing Blu-ray because you can tell the different on a 27 2560x1440 and 30 2560x1600 is specious. Your presumed entitlement that Apple should offer you an option you wish simply because you desire it is fatuous. Your stating iTunes HD content isnt HD because its not as HD as content on Blu-ray discs is vacuous.