Given the tear-down findings for the new Retina MacBook, looks like it is a very cool device to have, at least for the 2-3 years before an OS update comes out that leaves it behind, or the battery dies.
FWIW - the battery can be replaced for $199.00 (non-user serviceable) - hardly a reason to abandon the computer if/when the battery fails OOW. In my experience, most people do not need their battery changed in under 2-3 years of usage since the MacBook Pro's switched to using built-in, 1,000 charge cycle batteries. (Excluding premature failures, which are covered by warranty regardless.) I haven't seen many MBP's come my way with over a thousand charge cycles on their batteries, but that is just my experience.
__________________ ACMT MacBook Pro (15-inch, Mid 2012) 2.3 GHz Core i7, 16GB, 256GB M4 SSD iPhone 8 - 64GB S/G • Sound System Audio Engine A2 • Display UltraSharp U2412M 24" Custom Built Gaming PC Kaby Lake Edition | 16GB DDR4 | GTX 1070 8G
While Apple's new Retina MacBook Pro includes a display measuring 2880x1800 pixels, the default display options do not allow users to run their systems at that full resolution. Instead, the extra pixels are used to display a higher level of detail on a canvas representing the previous 1440x900 resolution. But users who wish to use a desktop with effective resolution higher than 1440x900 can still do so, as System Preferences offers several different options ranging up to 1920x1200.
Those users who want even more screen real estate by tapping into the full 2880x1800 resolution of the display can also do so, but the option involves a workaround that is not authorized by Apple. Macworld has more details on the process, which involves using either a third-party app like the paid SwitchResX (as noted in our forums) or one of a number of free options that have sprung up such as Change Resolution.
Running a 2880x1800 desktop on a screen measuring only 15.4 inches diagonally obviously results in very small text and user interface elements, but for those willing to sit close enough to their screens to make the onscreen content readable, it may be an interesting option.
As noted by developer Steven Troughton-Smith, users running Windows on the new Retina MacBook Pro can also take advantage of the full display resolution, simply setting the resolution in preferences within Windows.