CK is right however there could still be sneaky ways they or others can hide a discreet low powered low level component based miner that mines while the consumer device is powered. This would hash at a super slow rate however when you do the bigger picture overview and realize maybe its about numbers and for example lets say they produce 20k TV sets with this discreet miner secretly within the design it adds profits to the manufacturers and integrators as such never the consumer. Now this would eventually lead to heavy legal issues if discovered such as class action lawsuits but thats a whole other topic... Fact is real mining requires like CK said lots of power and ventilation more so then one can pack into a modern flat TV set. But it goes to say if they really wanted to add a miner it would be a discreet low powered alternative if anything...
just my 2 cents
Even then people keep ignoring the pooled mining aspect I mentioned. Are you all assuming these will be mining solo - A consumer device couldn't support a full mining node and would need lots of bandwidth so that's not an option. Where would they point their hashrate? Would Samsung really start running a mining pool? Do you really think a company the size of Samsung would mine in secret and risk massive backlash when the profit margins DON'T WORK?