Paul - what sensors are providing this synthetic vision? Radar, IR, digital database, Google maps?
Crab, a combination of GPS and digital terrain maps, with attitude being provided by any AHRS you have... In our B206L3 it's coming from the Garmin 650 GPS's AHRS, when I'm flying some random aircraft it's coming from the AHRS in my portable Stratus ADSB receiver.
Looking at the two videos posted, I doubt the terrain map is detailed enough to help in those narrow valleys. That's pretty crazy!
Next time I fly with my buddy I'll try to get a picture of the setup in his R66.
Re: Gordy's statement about time to switch to IFR, it's not really the same thing, because you're not having to interpret instruments... It's just another picture of what you are seeing out the front window. Same thing you see with a Garmin G1000...