Interestingly no one answered this. In TigerVNC, when you are logged into the session. Go to System > Preference > Display
from the top menu bar ( I was using Cent OS as my remote Server). Click on the resolution drop down, there are various settings available including 1080p. Select the one that you like. It will change on the fly.
Make sure you Apply the new setting when a dialog is prompted. Otherwise it will revert back to the previous setting just like in Windows