Can you really imagine a future in which people all over the worlds do not work at desks?
Or one in which people sit at desks doing all their work on a tablet or a smartphone?
The issue is an ergonomic one, and I just don't buy the idea that the "shift from desktop to mobile" is "the same magnitude, if not greater, than the shift from desktop app to web".
Python will not end up as mere glue. As the article points out, there is going to be a large supply of new Python programmers (or "non-programmers") arriving shortly, due to educational programs and Pi type devices. Remember "Computer Programming for Everybody", or "CP4E"?
http://www.python.org/doc/essays/everybody/
That was the original vision for Python, and it is slowly happening, don't worry.