Every article I read specifies that TFT has inherently inferior viewing angles. Take, for example, this:
TFT Guide - Part 2 - Viewing Angle Technologies - Introduction
Just to quote from the above link:
"(1) When you view a TFT display from the side, you will quickly notice a dramatic loss of screen brightness and a characteristic change of displayed colors. Older flat panel displays typically have a viewing angle of 90 degrees, i.e. 45 degrees to each side. As long as there is only one viewer this isn't a problem. As soon as you invite a second viewer, for example a customer you want to show something to, or an additional player for an action game at home - then you won't have to wait too long to hear a complaint about bad display quality."