The new MacBook Pro15-inch  will be a significant departure from the current design, with a retina display and an ultra-thin profile,It will be so thin, in fact, that it won’t have room for an optical drive,
Other design changes include a power button on the keyboard itself (replacing the eject button) and, possibly, the lack of an Ethernet port (replaced by an extra Thunderbolt port).

The MacBook Pro’s new retina display — the same technology that’s in the new iPad — is described as “definitely the most important Mac innovation in years” by the sources who’ve handled a prototype of the device. The specifics are unknown, but users should be able to choose between several Retina resolution modes.high-resolution Retina display, an ultra-thin design and a speedy USB 3.0 connection will likely make it to the list of features of Apple Inc.’s upcoming all-new 15-inch MacBook Pro laptop.Meanwhile, a USB3 port may round up the list of features for the new MacBook Pro, with support for USB 3 supposedly contained in Apple’s software strings in 10.7.4 and 10.8 betas.