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?

>>13-14
Save face? What the hell are you guys talking about? Please keep your responses related to the OP.

>>1
Why do you want more colors? 256 colors are more than enough and you have way more than that in your LCD.