The TFA is quite outdated. Those Seiki and 24/30hz stories are so 2013.
There are now at least 9 manufacturers making 4K monitors based on the 28 inch TN panel from Innolux and at least 4 manufacturers making 4K monitors based on the 31.5 inch IPS IGZO panel from Sharp. Both TN and IPS panels are capable of 60hz and 10bit color(8bit native+2bit FRC) at 3840×2160.
They come with a wide range of connectivity, including HDMI 2.0 and DisplayPort 1.2, both of which are capable of 4k @ 60hz,
Two G-SYNC 4k monitors have been announced so far(AOC and Samsung).
The competition is fierce and prices have dropped significantly: for the TN panel prices go for about 500-600$, for the IPS one range is 1600-3000$.
Don't expect to run Assassin's Creed 4 at ultra settings on 4K at 60fps+ unless you are driving a couple of 295X2 in 4xSLI. But if you adjust settings to medium/lower settings 60 fps is not that hard to reach is most games already. And G-SYNC will help a lot with those spikes when the fps drops below 60.
So yeah, mass-media will always do what they do best: scare mongering with cheap info they got in 30 seconds of google searches.
I'm been following the 4K phenomenon closely in the last 4 years. This year has been an amazing year for advancements in 4K and surpassed any of my expectations. I expected these low prices only in 2015 or maybe 2016.
Is it the time for 4K now? It depends what type of person you are. For me, I've been having a 2560x1600 monitor for the last 5 years and yes, its time for 4K.
But if you the type of person are looking for a "hand-me-over" monitor for 50 bucs, possibly second hand, fvck no. Actually, maybe even 1080p is too much for you :)