C64 Hacks

What is the name of C64 trick, used to double the number of colors by blending two separate frames and halving refresh rate?

for example:
http://www.youtube.com/watch?feature=player_detailpage&v=EcVa0zviOJw#t=423s

is there a way to emulate it on LCD?

>>16
You blew my cover! No, really, you did.

Still, I don't know what they mean by "saving face". It's not like I have some reputation I destroyed by saying "please don't act like /g/tards".