This notion that Michelinie Iron Man is more physically comfortable to read because its pages are thinner seems quite spurious. I tossed (gently placed so no damage would occur) 3 omniboo on the kitchen scale to test this notion. The results: Amazing Spider-Man vol 2 (~960 pages; 2.9 kg); Iron Man by Michelinie (~906 pages; 2.4 kg); Lee/Kirby Captain America (~840 pages; 2.5 kg). So, while IM's thinner pages make it the lightest of the 3 books, if you can feel the difference between these books (0.1-0.5 kg) and feel it makes for a significantly more comfortable read, then you might need to put the books down and pick up a dumbbell.

On the other hand, I can physically feel the difference in paperstock between Iron Man and the other two books. The paperstock on ASM vol 2 feels like the paperstock on the current MMWs to me--not as nice as some books but still alright. Iron Man feels more like cheaper trade paperback stock. And by eyeballing the 3 books I don't see much of a difference in thickness such that you'll save significant shelf space.

So, you'll have to do better than "it's more comfortable" or "it's saving me lots of shelf space" in order to convince me that this isn't a way to squeeze more money out of a $100 book. Maybe they should ask Dark Horse how they make it happen?