I have one of the new Macbook pros. My initial observations with Logos are as follows:
* The home screen is beautiful. Everything renders at high(er) resolution and looks great. Not just the ribbon but all of the content.
* However, once you open a book the resolution falls apart for the content. The Logos windows, titles, etc, all look great. The books are the problem almost to the point that you don't want to use it.
* It is scary fast.
Let me know if anyone has a specific question and I'll try to answer.