Looks as if you've a GPU problem of some sort. You could try running the Apple Hardware Test to see if you encounter any errors, but I would go back to the Apple Store and insist that they run their more 'technical' diagnostics on the machine.
I have this problem on the lower third with Mavericks. Sometimes the computer just stays black when I leave it on battery and it goes to sleep. It won't wake up until I hold the power button down for a long time and it restarts. If I close the lid, then reopen later I get the artifacts you show here, but only on the lower third. I do not get them EVER if the computer isn't CLOSED to sleep. Of course when walking from one room to another (think in terms of large hotel where this could be a 15 minute walk) I don't want to shut it off but I don't want to carry it open either. THis is a problem. I didn't have this problem before mavricks. I'm on the original MBPr which I purchased Jan 2013. Otherwise it's been flawless. Just one dead pixel cluster and the battery life is gradually decreasing.