Hi, I want to buy a plasma with high definition but I'm being told this is waste of time (by the chap in the shop) as even the so called high-definition compatiable plasmas will need to be upgraded when high-def is finally out. This, as he tells me, is due to the fact the plasma screen CAN show the high def picture but the TV TUNER that comes with it CANNOT. So my question is 1) Is this the case or am I being sold a lie ? 2) Do most decent plasmas have the TV tuner integrated ? Thanks for your help, I'm new at all this and I'm hoping you guys can help.