You can't be serious. That thing not only looks ugly and bulky, but fragile too. And I don't think it could be used on the tram conveniently either.

On the other hand, an N810-like device with modern hardware would do the job well enough. The Neo900 comes to mind, but that is quite small for truly productive use.

(Although I was more productive on the N900 than on the N9 or the Jolla combined.)

A 5" device with a slide-out keyboard and an N950-like slider mechanism would be perfect.