Fun, lets argue this a bit more...
You talking about your http://cl.ly/image/3i3Q0O1R042K/ link?

Big laptop in the top-left shows a [Cancel] [Next] button at the bottom of the popup.
The FxOS screenshots show the Next buttons inline in the header.

So it looks like we should be doing the big-laptop workflow (assuming these are semi-recent screenshots).

We could float the Next button to the right, but then the desktop has no way to go back (whereas the FxOS version does).

Y/N?