That's true... It's not supposed to replace the standup of strict SCRUM tbh. - but in many cases, there is no strict SCRUM just elements of it being used without high discipline. Also, the concept is thought of to help many different kind of teams, i.e. sales teams, marketing teams etc.
Nice article! We totally agree and don't believe in those "we need to replace email with an app" approaches. For example, that's why we build our service StandupMail (http://standupmail.com) completly upon emails.
I truly believe in the low-featured phone market especially in emerging countries. The strategy is swimming against the stream of smartphones everywhere which don't have the growth rates in countries like Nigeria, Indonesia, India etc. than in America/Europe.