I love Martin's renders, they look wonderful.
Three things I'd like different about it in real life vs. the renders:
1. Smaller screen bezel - see Dell's upcoming
XPS 13. If they use a 12" 16:9 or 16:10 screen, with a similar-size bezel, it should be JUST wide enough to fit their current mobile keyboard. (It would seem silly to have a different-size keyboard on this vs. every other laptop.)
2. MORE PORTS! I'm not asking for MBP level of ports, but more than just one USB. With the size reduction of USB 3.1's type-c connector (which I *DO* hope is on it, and wholeheartedly support the idea that it will ONLY have type-c connectors,) please put three on - two on the left, one on the right. Best if all three are capable of full power transmit, but if it comes to it, make the rear left one the power plug. I don't want to have to use a dongle/hub/whatever to both charge *AND* plug in a device. Likewise, having one Thunderbolt port would be nice. With Thunderbolt (especially if it's the upcoming version that can do power transmit sufficient to charge a laptop,) having one Thunderbolt as rearmost on the left side, plus one USB type C on each side (with at least one of them capable of charging as well,) would be good.
3. SD slot. I really like having an SD slot for transferring pictures, and "simple" add-on storage. While I'm on the subject, it WOULD be nice if all of Apple's devices SD card slots were the same "depth" - I don't mind them not being all "100% insert flush", but at least make them the same depth so that companies that make "MacBook Air expansion" SD cards like PNY, SanDisk, and Transcend would only need to make
one depth of card that works across all devices. Go ahead and make it the "least depth" one, that's fine.