If you look at the specs of the latest models of lots of different laptops, specifically, those built around the integrated graphics of the 22nm "tick" Ivy Bridge or even 22nm "tock" Haswell — the latest and greatest generation of Intel processors as of mid-2014 — the manufacturers still say that they only support 2560x1600 as the maximum resolution.
Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors
Maximum external resolution: 2560x1600@60Hz (DisplayPort via optional Mini DP cable);
Also, the latest and greatest 199 USD Haswell netbook — Acer C720 with Intel Celeron 2955U — simply no mention of any external resolution at all, has an HDMI port.
Do any or all of these and/or other Ivy Bridge and Haswell laptops support 3840x2160 @ 30Hz like what's needed to drive Seiki 39" SE39UY04 at its native resolution, or do none of them really do just as advertised?