@ - DJ Dan G'day mate, look the idea is good, but the main issue is checkes on any area that will have text on it is very hard to do, you could add a very thin layer on top of the softkeys with the checkered effect on it, OR you could instead involve the checkers on your standby image, for a different effect

But as i said the idea is great

If you were to use this effect in the nav bg and not the standby that would be easier, cause you could just apply a black flat color overlay to the checkers pattern, and yet still be able to read text, plus have your cool effect.
anyways it's up to you enjoy yourself, be creative and don't worry about the rest, it's all about fun