come on man, we've been through this before, that is not true for all televisions. non-3d 120hz panels with a mode that turns off all post processing can be had and the input lag is +/- 10ms of all but the most expensive monitors. 
http://reviews.cnet.com/8301-33199_7-57587317-221/game-mode-on-cnet-tests-tvs-for-input-lag/
i know leo bodnar from iracing...he and a couple of other gadget tweakers came up with that very useful device.
All hdmi connected devices may have input lags of several dozens of ms. Low input lag models are far and between.
Brand   Model Number   Size   Display Type   Input Lag (Camera)   Lag (Leo Bodnar)   Price
Sony   KDL55W905A   55"   LED LCD   8 ms   20 ms   £2000
Sony   KDL-55HX853   55"   LED LCD   28 ms   N/A   £1750
Panasonic   TX-L55WT65B   55"   LED LCD   31 ms   38 ms   £2300
Samsung   UE55ES8000   55"   LED LCD   31 ms   N/A   £1900
Sony   KDL-55HX823   55"   LED LCD   31 ms   N/A   £1500
Samsung   UE55D8000   55"   LED LCD   33 ms   N/A   £2000
Samsung   UE55F8000   55"   LED LCD   44 ms   44 ms   £1850
Samsung   LE55A956   55"   LED LCD   45 ms   N/A   
Philips   55PFL8008   55"   LED LCD   46 ms   50 ms   £1900
If I was shopping for a gaming oriented screen I would get the new Eizo 240hz panel.