Actually, my main reason for buying such a TV was to use it as a living room computer monitor/web browser as well.
Many DVDs are better through a computer for two reasons.
Firstly only the latest DVD players have digital outputs (HDMI) and most people use s-video or SCART/RGB involving a trip through the analogue domain (and back again on an LCD).
The software/graphic-card-hardware scaling is better than many TVs or set-top boxes plus you have the option of tweaking the post-processing e.g. deblocking, noise reduction and sharpening can help.
My only problem with LCD is black level, even on the latest.