i5 is faster and better than core m.

You do realize that

a) that marketing page compares against a processor that is 4 years old, i.e. the processor in the 2011 MBA?

b) Intel has made new core i5's in the last 4 years (or even 3 years, 2 years, last year...)

c) we're not at a point where physics allows us to make hardware that consumes < 1/3 the power, but performs better, using the same manufacturing processes.

It does, but it's at the bottom right of the screen. It's actually a pretty neat design and I didn't notice much difference from the youtube video I saw.

It does have a camera, but it is located just below the screen. Your hands will be in front of it when you type use the camera.