So - 4K tele - upscaling BlueRay etc

[TTmonkey]

So down at Curries theres some mezmerising tele's on display.

The curved, 4k Samsungs for instance.

Now, I'm aware that there is no 4k source available yet, but according to them, the tele can take a HD signal and upscale it to 4k.....

So, is this merely a blurry HD picture, or is it a better quality HD image approaching 4k quality?

I'm just not sure that there is a point to these teles yet... but if they can improve a HD picture, are they worth having....

or is it simply a con job to get people to buy 4k now?

Many thanks for your words of wisdom.