decrease UI size?

is there a way to adjust the size of the UI? everything just seems huge, artwork, etc.. my screen is 1920×1080 and it feels 800×600 resolution.. just so much wasted space, for example, i can only see 4 movies per row on the home screen. is there a way to resize the “grid” so i can see more on the screen?

example of what i mean: http://i.imgur.com/EQYbdev.jpg

settings set to full screen and native screen res 1920..