Look at those specs closer, its only 30hz at 4k res over HDMI, that would give such migraines if u used it for long periods.
I'm well aware of the specs. Typically a Seiki UHDTV will presumably do:
3840x2160 (8 megapixel)@ 30hz
2560x1440 (4 megapixel)@ 60hz
1920x1080 (2 megapixel)@ 120hz
1280x720 (1 megapixel)@ 200hz
Monitors and TV units of today don't work the same way as older tube technology. 30Hz doesn't creat screen flicker and strobing on modern displays so you are incorrect in your assumption with associating it with likely ill effects.
For what its worth, I bought a Seiki 39" 4K UHDTV for ~$498.99 off of Amazon. The price dropped afterwards, albeit only briefly, to ~$409 so I was going to return it or see about price matching. Although I very much liked the display I ended-up giving it to my sister to use as just a TV. Holiday season and all,.....
~40" was a bit too big for my desk and I have really grown accustomed to my triple 27" monitor setup. Also HDMI 2.0 has been ratified and is already showing up in the market.
I've heard Dell will be releasing a 27" 4K display for under $1000 USD in early 2014 so I might jump on that unless perhaps Seiki or some other company makes a 4K UHDTV a little smaller.
Anyway, 30Hz isn't that bad for everyday desktop use IMO. I hardly noticed it personally.
Edit:
I just realized in the post you were referring to I already mentioned that it was 30Hz at 3840x2160.