YES! - I have a lot of experience with 4k, both acquisition and display.
To be honest you'd be better off saving your money as at normal viewing distances you will not be able to tell the difference between HD and 4k.
The human eye is simply not capable of resolving that much resolution. At best, assuming you have 20/20 vision you will be able to resolve 1/60 of a degree of an arc. You would need to sit closer than 8 feet from a 60" screen to be able to perceive only a 10% improvement over HD !
I'm sure a lot of people that have purchased 4k panels will go "ohhh...ahhhh.... the picture is soooooo much better" but they are fooling themselves into believing they can see an improvement - they simply can't..... It's biology and physics. Unless you are projecting 4096 x 2160 onto a 10 foot screen you are wasting your money.
Also, do not forget that UHD (4k) does not even enter the Blu-Ray spec. In fact nor even does 1920x1080 50/60p! You will be watching 50i or 60i footage if you dump your 50p or 60p footage to Blu-Ray which means loosing circa 1/3 perceived resolution due to the Kell Factor.
4k as an aquisition brings it's own problems when it comes to post, editing and workflow although it does allow you to manipulate the footage somewhat.
OK - you asked the question as to what sort of player you could use to put 4k footage onto your TV (assuming you have decided to waste your money and buy one !
). Since you cannot use Blu-Ray, in order to maintain the integrity of your wonderous 4096 x 2160 footage you will be limited to:
A solid state device (hugely expensive and will not allow large/long video files to be stored)
A dedicated 4k recorder like the AJA Ki or Atomos (more expensive that buying the DJI Inspire 1 !
Some sort of hard drive/SSD hybrid device which will of course re-compress the original footage from it's original MPEG-4 AVC/H.264 format and may well not preserve a high enough bit rate (the Inspire peaks at 60Mbps) which will of course be is counter productive in shooting in 4k in the first place
It's not easy.... this 4k malarky !!!