IVB is not that chip (Intel's ARM competition is Pine Trail, Medfield, etc), and you bet they're charging a good price for it, as the case is with any 22nm chip they sell. The differentiator between Intel and ARM is already there on the pro: full blown Windows. You are also completely discounting the cost of a good IPS screen + added wacom digitizer.
Apple can keep costs down because they sell tens of millions units of hardware every year. MS doesn't, the most mass produced MS hardware, Xbox 360, is about 10-15M units a year and it's definitely not high quality hardware since it does not include precision crafted parts like a quality LCD screen or metal chassis. MS has no experience mass producing quality hardware by the millions. Since the pro is not going to sell in the tens of millions like the iPad, it's definitely going to be in the $999+ range.