Well it would seem that this would not be a problem for you. Most dvd's are widescreen and so is your TV. I'm not a video expert though so take what I say for what it is. If you rent or buy a dvd in the 4:3 aspect your tv will just chop the sides off. Some widescreen tv's can also stretch 4:3 movies to fill your screen if that does not bother you.
Dave
Dave