In my case, the donot disturb mode was activated (or rather, it was automatically synchronized from my phone settings). Once I deactivated this thing, my watchface started appearing again after lifting/twisting my hand.
I found it. Make sure do not disturb is turned off in your Samsung Wear settings and make sure that your wake up gestures are set the same in your Wear settings as your watch.
I have tried all of the tips shared. I have solved mine just now. Swipe down from the top to display the quick set features. Slide to the second page swipe to the right and you will see a thing called theatre mode. Turn that off. Then in my settings under advanced I have put My bezel to switched off and my tap screen is switched off. All is now working