The 4.4.3 Update Did This To My Nexus 5, Any Ideas Why?

Before 4.4.3 update

The 4.4.3 Did This To My Nexus 5. Does Anyone Know Why?-screenshot_2014-04-02-20-00-20.jpg

After 4.4.3 update

The 4.4.3 Did This To My Nexus 5. Does Anyone Know Why?-screenshot_2014-06-05-20-32-16.jpg

The gradation is obvious, but there also seems to be a resolution improvement. Any thoughts on why? Before the fanboys go wild, these were taken on different days. My battery didn't drain 40% during the update. :)