Uh... sort of.
The panel only updates a full frame 144x per second. No matter what.
If you turn off VSYNC then the monitor still updates 144x per second (unless it's GSYNC or Freesync in asynchronous mode), however it's MIXING different frames together which results in SCREEN TEARING (sometimes bad, sometimes not very obvious depending on many factors).
So you DO get newer parts of frames mixed in with older parts which CAN be a benefit, but the ENTIRE FRAME isn't new. Just parts.
If VSYNC is ON then the GPU is throttled down to match and only outputs a maximum of 144FPS.
*There ARE advantages to gaming over 144FPS on a 144Hz panel in case I'm not clear. However, I personally can't tell the difference between 200FPS (VSYNC OFF) and...