so Ipad 4 is slightly hotter than Ipad 3 but it cools down faster because it go to sleep mode faster than Ipad 3?
Why bother release Ipad 4 then, should have wait till next year and do somthing with the design.
Rumormongers think that Apple is going away from annual updates and will likely update more often with multiple ipad/iphone generations coexisting.