Samsung hasn't used 4K technology on any of their tablets yet, and neither have other manufacturers on the market. However, at the Roland Garros competition in Paris, Qualcomm was there to showcase their LTE broadcast and apparently they have used a Samsung tablet for this. Techradar suggests that the tablet Qualcomm used was a 4k resolution one.You can see that in the image there is a live broadcast going on, but that's only at 720p. However you can see that the tablet allows other windows to be opened and there you can see the real value of the 4k resolution which allows for a much greater detail of the image.Samsung hasn't announced anything yet about this 4K tablet but apparently they have one out there. It's just a matter of time until this technology becomes commercial.The tablet sported in these images is using a Qualcomm 801 chip and looks similar to the Samsung Galaxy NotePRO 12.2. Samsung stated that by the end of 2014, 4K tablets will be commercial, and it seems that they will be the ones to hold this promise. So the thing to do here is to wait until their next major presentation event and see what will happen.