One thing to look for, laptops with an Intel Iris Pro (5200) graphics setup. It's able to beat many NVidia lower end GPUs, such as the 730M series and pretty much matches what the dedicated midrange 650M can produce. The 5000 and 5100 are not quite as good, but still an impressive jump over where the 4000 series was.

Intel and Valve shipped the 5200 as the GPU for the developers edition of the SteamBox. The era of just automatically dismissing integrated graphics as a non modern game ready solution is ending. Though it's taken Intel a lot longer to get to this point then earlier projected.