Apologies for resurrecting an old thread, but I was just looking at the Apple MacBook site and it's clear Apple intended the rMB to be a completely wireless device. These screenshots make it even more perplexing then that Apple included an antiquated 1/8" stereo audio jack instead of something far more useful like a 2nd USB port, which could also be used with a wired headphone with a DAC adapter or otherwise, with far greater audio quality. For all of those saying the one USB port is like removing the floppy drive or Super Drive from the iMac, there's no comparison since they left the most outdated artifact on the thing, while short-changing the functionality of the MacBook in the product lineup. To truly be like the removal of the floppy or SuperDrive, they would have had to remove a legacy aspect of a MacBook, and forced the customer to interact in a new way. The USB-C port by comparison is anything but old-fashioned. So they've literally got a state-of-the-art electronic connection, and one of the oldest electronic connections known to man on opposite sides from each other, despite so many other better choices available for audio.
Add to that that this is the first sentence Apple writes about the rMB: "With the new MacBook, we set out to do the impossible: engineer a full-size experience into the lightest and most compact Mac notebook ever." So Apple want's to give me a full-size experience with one port?
Maybe we are the ones who don't understand Apple.
I suspect the Macbook was inspired by the concept of an iPad attached to a bluetooth keyboard. Just as the iPad has only 1 port and 1 audio jack, it is possible that the Macbook was always intended to have only 1 USB port.
In this context, it doesn't matter whether the Macbook could have had 2 or more ports or not. What matters is that perhaps, Apple will continue to stick with 1 port out of the principle of it. Just like the iPad, I expect that the battery life will eventually improve to a point when we will only need to charge it overnight, leaving the port free for connecting to peripherals during the day.
If anything, I would argue that since Apple wants to go wireless with everything, all the more they should include as few ports as possible. More ports would simply be a crutch that get people to stick with wired solutions for as long as possible.
For example, if I can't plug in my phone to my Macbook to transfer photos, I have to use airdrop or a cloud sharing service. If I can't plug in a printer, I have to use a wireless setup. Instead of connecting the Macbook to a conference display, why not install an Apple TV and try Peer-to-peer airplay instead? If you want people to adopt the newest and latest technologies, sometimes, you have to be willing to take a bit of flak upfront by breaking backwards compatibility with existing ones and making the process so inconvenient that the consumers are indifferent between sticking to the old ways and trying out the new solutions.
And to give Apple credit, they are one of the few companies who can pull a stunt like this without suffering (too much of) backlash from their users. If anything, I imagine there are some Apple customers just rubbing their hands with glee, anticipating the next technology to be disrupted and made obsolete by Apple.
Don't be surprised if later down the road, Apple removes all USB ports from the Macbook instead of giving it 2. That's my impression at least. That their biggest shame is not that they couldn't give it 2 ports, but that they had to give it 1 when they wanted none.