Does the 16:10 screen on the Nexux 4 affect apps?

I want to buy the Nexus 4 when its available. After reading some test i noticed that the screen is 16:10 not 16:9 like the Galaxy Nexus. Some questions started to appear:

Does this affect apps? I don't want black borders on the left and right of the screen.

And how many apps are 16:10?

Is it right that the screen has the same high as the one from the Galaxy Nexus and its just taller?