Hehe, while I share in a way the captain's opinion, it's never so simple.
Truth be told it's impossible to really answer the question as I don't know how many and what games you play (and would play on a 4K TV).
I also don't know your rig specs, but I'll assume they won't be an issue in either case.
That said, if you're completely obsessed with visuals and can't stand the sight of pixellation - then a 4K TV + some headtracking (a must) will probably be the choice for you.
If you're not a fanatic on visuals then the immersion factor will definitely outweigh the sight of low res.
I'm somewhere between medium-high visuals-junkie

So in the DK2 days I'd often switch to the 4K TV from the HMD.
With CV1 that won't happen, VR would easily be the choice for me.
Also it'll take a while for the 2nd gen HMDs to come out, a good two years seems a reasonable estimate.
Playing other games on the 4K screen does of course make a better argument for the TV, but bear in mind several caveats.
You need to pick up the right model so as to support the right refresh rate and have as little input lag as possible.
Then, you'll need a beefy machine capable of churning out solid 60FPS in games so you don't get capped by vsync.
For myself this is a problem - especially since AMD has had no crossfire support in any of the relevant new game releases. The situation in the green camp is better though far from rosy.
On the odd chance you don't have a rig yet and are thinking of buying one right now (or pretty soon) - you'd want to wait ~6 more months for the new GPU node. You'll be able to buy a much better graphics card then. One capable of running VR with supersampling & 4K at the needed framerate (though just barely probably)
Also - an intel CPU is largely preferred.