Of course, the number one factor for LG will be to push up volumes, which will push down costs, which will allow them to hit that target.
So we're back to a chicken-and-egg scenario, yes. But brute force + aggressive pricing + good marketing will go a long way.
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.