In theory, but i've never heard of one 'burning out' to this day.
With regards to Moxxey's comment - i actually started typing about the BV7-40" Mk3 being a superb LCD image, but then deleted it as it wasn't actually the question. The 7-32" to my mind isn't as good a display as the BV5 non-HD. You also need to factor in the thought that for a while yet you will mainly be watching non-HD films and tv programmes anyway.
I can also vouch that a good quality digital source will look superb on a '5' - plus also take into account that the BV5 has a screen 10" bigger!
Don't get me wrong, i love the styling of the BV7 - it's really quite beautiful in it's design and the 7.1 is a truly superb tv speaker, plus the inbuilt DVD player is a real bonus - but at the prices they are now, the BV5 is storming value...
Lee
BeoWorld - Everything Bang & Olufsen