[makomk]

In addition to the laws of physics and the engineering required to build TVs working against this, the EU deliberately changed the energy efficiency scale for things like TVs a few years back to specifically make an A hard to get and something that wouldn't be achieved by products currently on the market. They were probably too optimistic about future improvements too - a lot of TVs had to add special eco modes that aren't really designed to be used to meet the minimum efficiency now required by EU rules.