Laptops with Haswell CPUs have already hit the market and more are likely to be released throughout the year.
The caveat is that thus far, only the quad core i7-4xxxMQ series CPUs are currently available. Not sure when the dual core i5 and i7 will be though. I am considering buying a next gen Lenovo ThinkPad but rumor has it they are not scheduled to be released until either Oct. or Nov.