For me, i just like to watch pictures displayed from the TV if it's displayed on correct aspect ratio, stretching image could make the image too wide or too tall.
I don't know a lot about possibility of burn in, but i think "modern TV" will do just fine, at least for another 5 to 10 years ahead.
Just like monitor computer in office environment that for 4 to 5 hours of the works hours per day is just displayed Microsft Word (Microsoft Office) for 5 years, it work just fine, since it is CRT. (In Indonesia, there is much second hand computer monitor that already aged, 4 years or more)
I don't know a lot about possibility of burn in, but i think "modern TV" will do just fine, at least for another 5 to 10 years ahead.
Just like monitor computer in office environment that for 4 to 5 hours of the works hours per day is just displayed Microsft Word (Microsoft Office) for 5 years, it work just fine, since it is CRT. (In Indonesia, there is much second hand computer monitor that already aged, 4 years or more)