Seeing the uptake in VRChat has been pretty awesome. For the record, I grew up on MU*s, built the first Second Life sex toy interface in 2005, which ended up with me working at Linden, so I have a special place in my heart for virtual worlds.

Otherwise, I am always really interested in ways people build for themselves that they're willing to share with others. So the answer to this question tends to be "my dream ideas are the stuff I can't possibly dream of" :)