rMBP Doesn't Wake Up From Sleep After Upgrading to ML
Not a solution, unfortunately, but a report of the same problem with a MacBook air (mid 2012). It was running Lion without a glitch, but ever since I upgraded with ML, I can't wake it up from sleep (closed lid) when I try to use it back in the morning. To get control back over the machine, I need to do a SMC Reset (Left Shift - Option - Control + Power button at the same time) for a hard reset. I tried to install the SMC update mentioned in the EDIT, but the MBair refused to accept it. Still at a loss… 
I have unchecked the Power Nap feature to see if it would make a difference, but to no avail.