37" 120Hz 1080p 1920x1200for pc gaming

I am not familiar with your TV, but I believe there are differences between 120hz screens that will display a 120hz signal, and the 120hz screens that create the extra frames through interpolation. This is an important difference, as if it is achieved through interpolation only, then a 60hz signal will be all you can feed it, anyway. That being said, my personal experiences with 120hz TVs (a friend has a 120hz bravia, another 120hz aquos) that even with "only" 60hz feeds, the 120hz by interpolation performance still look way better than my 60hz lcd.

1) What resolution is your current screen? You very well might not see 120fps @ 1900x1200, if you are currently achieving your frame rates at say, 1024/768.
2) Correct
3) Depends on the resolution of the screen, and the response rate. Generally, monitors have better response rates than large TVs. You may not notice this difference though, to be honest, if they are close enough.

Thanks for the reply

1) The resolution is 1680 x 1050, i play all games at highest settings, some with AA...the only game i cant play at high is Crysis, but who cares if i cant play 1 game but can play all the other ones.

3) Got still the tv with the adds, says its 20,000:1 Dynamic contrast(the HDTV is 700,000:1). The response time of the lcd monitor 22" is 2ms (the response time of the HDTV 37" is 2.7ms), just a .7 difference.

On the link i posted, im looking for the specs, it explains the 120hz, however i dont know if its new frames or as you told, interpolled

If the screen is too big will i see like the frames? Or since its full HD it wont? I really dont know in TV's.

If you are going from 1680 x 1050 to 1920 x 1080, then you will notice a drop in frame rates. Actual size of the HDTV / monitor does not matter, only the total number of pixels.

In case you do not know input lag, it the the amount of time it takes for your keyboard / joystick / gamepad commands to be reflected on the screen.