On Thursday, October 8, 2015 at 7:27:40 AM UTC-5, trader_4 wrote:

AFAIK, there aren't any sources for true 4K yet. I guess regular HD
sources are supposed to look better anyway, they upconvert them somehow.
Whatever they are using for a demo source sure looks great. I wonder
what that source could be?

....you must have me blocked then...