1. That's ridiculous. The HD4000, let alone the GT650, have more than enough power to feed data to that screen. It's just a higher resolution for a GUI, it's not trying to render Crysis 3 or something. Even still, I've played Assassin's Creed at close to retina resolution and the fans and temperatures remained steady.
You probably didn´t read my whole post, because I am not talking about that specific problem people are having. I was addressing people that believe (like you do) that Apple can magically make thinner laptops dissipate heat better. And yes, that´s as ridiculous as your answer to my post.
You need more power to feed a Retina display vs. a conventional one, because there are more pixel active at a time. The Retina display on a mobile device needs a lot of power currently and that will only get better with IGZO or OLED. When Intel introduces their Haswell architecture, which is a lot more power efficient compared to Ivy Bridge, the problem will also be dealt with externally.
The people that use a laptop daily are not talking about the display of a GUI. They want to work with a Retina resolution and applications, the GUI alone is almost irrelevant. If you´re displaying a whole webpage though, OS X needs to upscale/render to a Retina resolution and 1600p or even 1800p is a lot more demanding than 1080p or 1200p. In the worst case (1200p vs. 1800p) that´s over 2 times more pixels.
If Apple keeps the size of the casing the same and doesn´t go overboard with TDP on the new Haswell chips, the second generation should be a lot better.
2. The cooling system "issue" you've brought up is even more ridiculous of a claim as these new enclosures, while thinner, offer much improved thermal management and cooling. The thinner chassis actually allow for hotter components and better cooling. These same parts in the last generation unibody run just as hot, if not even hotter, under the same conditions.
Dude, this is a laptop, you want to write on it and not burn your fingers. You want that heat to GET OUT of your case as fast as possible and that´s only possible with fans. And if you´re casing is smaller with less volume internally, even the best vapor chamber technology is not going to help you, a case with a bigger volume though, would easily leave you enough room with bigger and slower spinning fans or one big slow spinning fan. But since the Retinas are so thin, there´s only room for one or two very thin fans that need to be active almost all the time for the hot air to get out. And if they suddenly spin up, you´re going to hear it.
This is no iPad with minimal dissipation that can be dealt with through the casing itself, this is a professional laptop you have to work on. People are very sensitive if their casing heats up like some iPads under load do already and if laptops do that it´s extremely uncomfortable for someone to type on them. And if there´s also loud fan noise it´s going to annoy you to no end.
I cannot believe you even think that thinner = better. You must be a marketing troll.