Clarification - while some dual-band routers claim 900 Mb/s throughput, that is using both 2.4 GHz and 5.0 GHz channels simultaneously (450 Mb/s each). However, both channels cannot be bonded together, as far as I know, to create one really fast 900 Mb/s connection. My mistake. However, even at 450 Mb/s, that is still almost half GigE speed on wireless, which is really fast. For the remaining 50% GigE performance, if you need it, you can get the adapter.
Of course, if you are running a file server at work then you need GigE. But you wouldn't be using a RMBP as a file server, right?
Again, the RMBP is designed for people who do not necessarily need to be wired the majority of the time. Why is it difficult for people to understand that? Sure, you can point out that it lacks a GigE port, but the target buyer of the RMBP doesn't need a wired network connection. For those people, an adapter works just fine for the handful of times they need to get wired. I fall into this category and am thrilled that I don't have to carry around a heavier, bulkier laptop simply to support technologies which I don't use. Thanks Apple!
) . Some gamers, however, elect to run Windows to play games, either because the game is not available on the Mac or it is but the Windows version runs better. Regardless of the reason, a gamer who elected to use Windows for gaming could overclock the graphics card in the regular MacBook Pro to the same speed of the one set in the Retina. And gamers, unless I'm mistaken, are the main type of user who would benefit from an overclocked graphics card.
