Siliconera had some time to mess around with the Mega Man 2 3DS demo and provided a short description of what the classic was like running in 3D.
"The clip from Mega Man 2 was taken from Wood Man’s stage. See the fire? It appeared as if it was on its own plane in front of Mega Man. The robot wolf and Mega Man were on their own plane and the background was behind."
Mellahan, our own E3 attendee, had some hands-on time with the demo too. "The added depth certainly made the game look fresh and exciting," he writes. "It's kind of difficult to explain what it looked liked, but I think it can be best compared to the 'layering' effects seen during the secret Cut Man fight in Mega Man X8. Sort of. Of course, you can turn the 3D effects off anytime you'd like. Simply move the 3D slider to off, and you can enjoy MM2 in its classic 2D form. I really can't judge if the game will actually 'work' in 3D as the demo was merely a still snapshot of Woodman's stage; it wasn't playable. But, so far it seems promising!"
As previously reported, the tech demo is indeed going to be a full game, confirmed by Nintendo of America's president. Mega Man 2 is one of many classic games being ported over to the Nintendo 3DS in some shape or form. A popular theory is that these games will appear on a Virtual Console of sort, but that's only speculation.