There is no product, ergo no price or availability is relevant.
Sony has no 8G facility to produce this display and cannot, as a practical matter, even achieve the 500K annual production of an LG using a 5.5G line.
There is no difference in HDMI cables. If you can see the picture without visible dropouts or sparklies, the cable is working at 100%. No other cable will display a better version of that picture. You're simply wrong if you think there is a better digital cable than one that is already working.