Not to mention they add all those useless post-processing effects that increase latency to the point where it's almost impossible to play games on them.

I don't understand why a signal coming in through HDMI signal has 9 milliseconds of lag on my cheap monitor, and 46 seconds on my fairly nice tv. In gaming mode the tv has something like 35 ms of lag.

I've seen TVs that have enough input lag that you get noticeable audio sync issues if you use an external audio system. That's ridiculous.