Lots of talk now about the new line of Macbook Pros will have retina display as well. Seems the newest version will be a complete overhaul. Completely new design, removal of the DVD drive, Retina display @ 2880 x 1800 on the 15" screen.
I know this was the rumour back in December, but it looks like it's a lot closer to truth now.
http://www.bgr.com/2012/03/23/retina...h-this-summer/
http://www.tgdaily.com/hardware-feat...splay-macbooks
http://www.macrumors.com/2012/03/16/...in-production/