I went to John Lewis earlier, and was very dissappointed with the picture quality on the x85.  I asked for the remote and spent about 15 mins cycling through the channels.  

The FreeviewHD channels were terrible.  The Freeview channels that weren't HD were unwatchable.

In case you're wondering the signal strength was good - The problems were not related to lossy breakup - just very very grainy.

Seems weird to me that 720 on an 4k is really so bad... I also checked the colour tones and display modes in the settings menu but nothing would improve it.

The website says this about the x85 "everything's upscaled beautifully with the powerful processing engine". Nonsense!  

I'm interested in the new 2015 models and specifically the 65" x85c. I would like to know if there is a superior chipset in the 2015 models that would improve the upscaling over the older model I saw earlier today.

Jonny