The new MacBook Pro models have received major hardware and specification updates. There is also a separate model that has a Retina display and has a new design which is thinner than the other models and almost as thin as the MacBook Air at certain points.
The new MacBook Pros have got the next generation Intel Core processors codenamed Ivy Bridge. They can be configure to have upto 8GB of memory, 1TB HDDs and 512GB SSDs. The 15" Pros have new NVIDIA GeForce GT 650M integrated graphics with upto 1GB of GDDR5 memory. 13" Pros have the Intel HD 4000 integrated graphics. Both the graphics are said to be 60 percent faster. The Pros have USB 3 like the MacBook Air.
The 13" MacBook Pro starts from $1199 and the 15" model starts from $1799.
MacBook Pro with Retina display:
The MacBook Pro with Retina display is the next generation of MacBook Pro by Apple. It has almost the same specifications as the regual MacBook Pro models but it just has an additional Retina display which has a resolution of 2880 x 1800 (220ppi) compared to the resolution of 1440 by 900 in the regular MacBook Pros. The screen has so many pixels that the human eye cannot distinguish between each pixel, thus comes the name Retina display. The MacBook Pro with Retina display is 0.71" thick compared to the 0.95" thick MacBook Pros. The optical drive has been eliminated, SSDs are only used and it packs with it new ports including two ThunderBolt ports and one HDMI port. It supports upto 16GB of memory. It has the new MagSafe 2 connector, like in the Macbook Airs. All these factors have reduced the thickness of the machine.
The MacBook Pro with Retina display starts from $2199.
Apple with its new lineup of MacBook Pros has given it's consumers a choice to choose between a machine that has an optical drive, standard screen and less memory and is cheaper and a machine that has a Retina display, more memory, more ports and is more expensive. So it's your decision which one your would prefer.