Hey what's up fellas!! I created an account just to respond here. I just got the tk700sti BenQ about 2 weeks ago. I have the v1.03 firmware update, and it took me about 3 days of messing with different settings on my PC and different programs to get the 3D up and running. It looks INCREDIBLE!!! I have the bluray of Avatar 3D and it seriously feels like I'm at the cinema.
Anyhow, some details. Cyberlink PowerDVD 20 Ultra does NOT have 3D playback functionality they removed it. I also tried DVDFab, which didn't work, and also Bino open source player which was garbage. About to give up, I installed Power DVD 19 and it worked perfectly from the get go. Make sure to go into your hdmi settings on the projector and set the RGB to "Full" under HDMI settings.
Anyways, gaming is amazing on this projector, 4K HDR looks incredible as well. Now that I have 3D up and running, I can't wait to re-watch Mad Max, Aquaman, Black Widow, Godzilla vs. Kong, and some of the other good ones. Any questions you might have ask away!!! I highly recommend this projector, it's amazing.