I have a Samsung Galaxy S4 and every so often, without any apparent reason, while my phone is idle sitting on my desk (no dock or anything; it's just laying on my desk) the screen will light up and display the time and the icons of my any current notifications appear.
I have disabled daydream and unchecked "Desk home screen display"
It appears to happen randomly after device has been idle for some time. It's not a huge deal, but it's annoying and rather distracting.
My device is a rooted Verizon Samsung Galaxy S4 running android 4.2.2 on baseband VUAME7.