If you buy a TV as computer monitor replacement you should inform yourself well (or better test in a shop with the desired model).
A number of TVs have permanently enabled overscan, others apply "enhancements" to the picture which will make movies look better but cause artifacts for computer desktop use. Then the delay for this processing can also amount to a noticeable length of time.
And some TVs (but this applies mostly to older models) cannot be driven at their native resolution through all inputs.
The extra-wide aspect ratio of a TV really messes with you on a computer. At work recently, I requested an upgrade to dual displays.... they gave me two monitors, but tv-aspect-ratio and 1920x1080. It sucks! You really miss the extra 120 pixels.
@chithanh: Alot of cheapo TVs have perm. overscan, but generally they have workarounds or a "full screen" solution as well.
It really depends what you are doing with it. Reading and general computer use is best left to a smaller monitor with higher DPI. IF you're into multimedia or gaming, the bigger the better, and for the most part the content is designed to "scale" to TV resolutions anyway.
It is in .svg format and best viewed in Linux and/or Firefox as it is an international WW3 standard and therefore probably not compatible with anything from Bill Haley and the Comets.
Hmmmm. Everything else in the tech market has improved. My ten year old CRT outshines some fancy new monitors, even if it does now show some horizontal striping across the screen. Technology improves, but, pixels numbers decrease...