I'd like something like a mix between the 12" macbook and the MBA. The formers size and looks, the latters speed, battery and keyboard. Potentially a 13" screen by going edge-to-edge with no bezels on a design like the Macbook. And I would also very much like a better camera.
I'd be fine with only a single port, since I don't need any more.
Magsafe charger. I'm ordering a third party magnetic adapter thingie that's apparently going to awkwardly block the second port. But the safety factor is worth it. Just yesterday I took an awkward step and sent the magsafe cable flying off the old MacBook Pro which was sitting on my desk. The Pro didn't budge. I can't count the times my little old 2013 Air was *not* slammed around when I accidentally hit the charging cable.