I'm living in the Philippines right now. A month ago we moved to another house that does not have a TV included, so I was thinking of buying one. But we are planing to move to Mexico in a year, and it would be a waste splashing out a lot of money on a new TV just to discover that it will not work in Mexico.
AFAIK, a modern TV uses DC rather than AC so the power has to go into a DC converter at some point. I cannot think of a single good technical argument for making a TV with a 100-120v converter and a 200-240v instead of a 100-240 as you find in laptops.
But its not always the technical arguments that win. Maybe Sony/Samsung/LG/Philips/Panasonic/etc... want to divide the markets so it not as easy to do imports between the continents or something? Does anybody know if this is now possible, or is it still impossible to run the same TV on 100v and 220v?