It applies to the surface laptop too. Basically it appears that in order to equip them with a quad core, the iris graphics haven't been included, or at least the iris graphics parts weren't selected.
Kind of silly because for that massive price premium, you really get no additional functionality. Not that the iris graphics really make a huge difference, but it allows the surface to have a chance at playing some games. However, if you're spending just on clock cycles, then the i7 now, is really a waste of money.
This upgrade cycle, is odd. No quantum leap at all, and I think the previous models re the better buy, again, if looking at the i7's.