Hasn't shown up in the desktop chip pricing, which is pretty much dead identical to the Ivy Bridge chips they were replacing.

Laptop chip pricing is a much more opaque art and will be clearer in a month or two, and the very-low-power tablet ones are essentially a new market with nothing to compare to except Atoms.

eta: from those early laptops announced at Computex for which price is already available -- not many -- it does not sound like the machines with the quad core i7 Haswell chips are being priced any higher than the Ivy Bridge-based models they're replacing were when introduced last year, and in some cases they're being priced competitively with the models they're replacing (despite the latter being a year old and at the end of their lifecycle.) Obviously a very small sample size so far.