Some useful guidance
here
Seems some (all?) HD4K are including the bezel and whilst this may not be significant on say the Sony Bravia as the bezel is very narrow some of the more economy models have quite chunky surrounds.
Take your tape measure and as always Caveat Emptor.
BTW I just measured our 1080P Sony and the 42" is the active screen excluding the bezel.
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History is much like an endless waltz: The three beats of war, peace and revolution continue on forever.
However history will change with my coronation - Mariemaia Khushrenada