I've seen some 4K LED TVs and to be honest, the clarity is excellent but I still prefer the super blacks and natural look of everything on my Panasonic Plasma. No need for me to upgrade any time soon.
I recently upgraded to 4K.
* TV Cost: A little more than a regular HD TV, but if you look for sales and price match the difference is not that much.
* Why Buy a 4K? Decided to future proof in the event that 4K becomes main stream.
* Rogers Cost Increase? Actually my costs went down and I received the new 4K box. The remote is great because it is back lit. You will also want to have unlimited monthly usage as 4K content on Netflix chews up a lot of gigs.
* Installation: A technician needs to install it to set it up on your TV. The tech was great as he cleaned up my current cable network by adding an electronic master cable switch for all of the TV's throughout the house.
* Content: Limited for now on Rogers but the tech informed me that they are waiting for the CRTC ruling on bundles to finalize. We should start seeing more 4K channels, similar to how fast the HD channels became mainstream.
* Netflix: I upgraded to the 4K Netflix - I think it is $12/month, but you can have 4 Netflix users on one account at any time.
* Picture Quality: The 4K content on Netflix and Rogers sports is crystal clear. The regular HD channels are also up-scaled and look good. Some older shows do not look that great and the Rogers community channel, still in analogue, looks pretty crappy (hard to believe we were used to watching that quality).
* 4K TV's: Do your homework! Some 4K TV's are great for sports and others are not. I first had a Vizio and it was horrible for watching sports. The Sony on the other hand was and is amazing.
* Plasma: Still have an older plasma and as previously mentioned, the colors and blacks are very good compared to the 4K experience. If the plasma was still on the market I would have went that route instead of 4K.
* Others: Depending on your TV you can watch you tube videos in 4K. If you have a new'ish cell phone, you can view your videos in 4K on the TV. It is amazing the quality of the picture and how easy it is to make videos. The days of recording videos on a hand camera then plugging it in to your TV are gone. Today's smart phone can link in wireless and you can watch a video instantly.
If you are at the stage of where you need to upgrade your TV's (I was since my old CRT blew), 4K is a neat experience.
This is a great site for 4K TV reviews...
http://ca.rtings.com/tv/reviews/by-resolution/4k-ultra-hd-uhd/best