Also you don't throw all your eggs into one basket. Intel have roadmaps probably 15+ into the future! They might have the tech now but why shoot themselves out of more profit, when they can stage releases.
Why do people think this, almost every piece of equipment in Intel's fabs today making 32nm chips, simply weren't available 3 years ago(a year before 32nm started being made) and didn't exist 2 years before that. Intel don't make this kit, each fab will cost 2-3BILLION to fit out with new kit every two years, and the companies researching ways to make the equipment work take years to come up with improved versions and a long time to make the equipment.
Theres no staggering anything, EVERYTHING in high end cpu's is dictated by transistors you can fit in a given space, Intel can't increase this with the equipment they have, and if they go over a certain die size they'll end up losing money overall, they make crazy profits per chip, but they have to pay for the R&D and the equipment which is probably in the range of 20billion every couple years to keep 4-5 fabs upto date.
You double the size of the chip, you quadrouple costs, and end up making profit per chip, but losing money when you factor in R&D.
Ok, for reference 10 years ago we were still on P4 Northwood(just under 10 years actually) 55million transistors 145mm2 in size. thats 0.3million transistors per mm2. 2600k i7, 995million transistors, in 216mm2, the transistors are about 12 times as dense in current chips, something physically impossible on older process tech and equipment which wasn't in existance till a few years ago.
If I've got this right or not, a 995million transistor chip on the 130nm process Northwood uses, would be around 2623mm2, or around 16cm x 16cm in size? Now, imagine somehow fitting that in your system, and being 18x bigger, it would use 18x more power, which would be 1500W. Now, iirc they would only have been on 200mm diameter wafers back then, which would mean one wafer one fit one chip on it, and due to yields, you'd probably only get one working chip every 10+ wafers, at $8-10k a wafer.......... yeah, theres a reason they couldn't make the same chips back then.