The Type Ten Kludge can hold a lot more weight. This is not handlebar mounted, but as the title of the thread states, the cargo box is mounted to the headtube. The headtube mounting is easier to steer when fully loaded.

I think the only problem with the iMac-Bike shown in these pics is the clash of colors- the blue-green iMac plastic and the yellow bike frame don't match; and I agree that color-wise, it looks horrible. I don't want to paint the iMac yellow, and every time I suggest that I might repaint the frame a color other than yellow, people tell me not to. They like the yellow color. Apple made the iMac in several different colors, including yellow, but I don't know if I could find a yellow iMac. I have talked to someone who has a blue iMac in their basement, so there are others out there.

No, I wouldn't trade this bike for a Brompton. (Do you, by any chance, have a Bakfiets? I'm guessing that you do, on account of your screen name...)

Let's compare this bike to a Bakfiets, instead of a Brompton. The Type 10 is so big, at 77 inches lengthwise, it almost doesn't fit into an elevator.

I like the streamlined shape of the iMac, I find it pleasing to look at. Granted, beauty is in the eye of the beholder, not everyone likes it, but I do.

After all the time it took to cast fairings myself, using fiberglass, the gist of this story is that I saved hundreds of hours by recycling the iMac plastic, which is so similar to the Type 9 fairing (the dark green one , above), that it would be hard to tell the difference by looking at it from a distance.

I suggest that you go to:
http://www.speed101.com
and learn a little more about aerodynamics before you criticize.