Anandtech has an absolutely top notch Retina Macbook Pro review.
Here`a quick take away:
"I’m giving the MacBook Pro with Retina Display our bronze Editor’s Choice award. Making it the first Mac to ever receive one. It would have been a silver had the software story been even stronger (iWork, Mountain Lion, Office and Photoshop being ready at launch would have been a feat worth rewarding). And it would have been a gold had Apple been able to deliver all of that but without sacrificing end-user upgradability. Which brings me to my final point.
I accept the fact that current mobile memory and storage form factors preclude the creation of the thinnest and lightest form factors. But I would like to see Apple push for the creation of industry standard storage and memory form factors that wouldn’t hinder the design of notebooks like the Retina Display equipped Macbook Pro. Apple has already demonstrated that it has significant pull with component vendors, this should be possible. The motivation behind doing so is no different from the motivation driving the use of Retina Displays: for the betterment of the end user experience."
"Apple’s success hasn’t been because it is a vertically integrated company. On the contrary, everything Apple has done Acer, Dell, HP, Intel, NVIDIA and Microsoft could have done together. Apple is successful because its competitors have all been selfishly focused on themselves rather than all coming together to build better computers. Based on my conversations with Intel and some of the OEMs at Computex earlier this month, the wake up call has been heard. Intel seems quite motivated to help its OEM partners do better. It is a bit troubling for the ecosystem that Microsoft is throwing its hat into the ring as a competitor - especially as it was Microsoft's inaction on the software side that really hurt the PC OEMs over the past several years.
For years we’ve been pushing OEMs to focus on better displays, and for years we were given cost and customers-don’t-care as excuses for why we don’t get them. That’s all starting to change."
Much much more here