The only thing more banal than rappers spitting rhymes about their new 50” plasma screen is smug hipsters who won’t shut up about the fact that they don’t even own a TV, man. I apologise in advance for the sanctimony you are about to receive. Like so many clichés, if you dig deep enough, there’s a lustrous pearl of truth nestled amongst the old shellfish guts. So, here goes: I haven’t ‘watched TV’, in the conventional sense, for about five years…