The audience does appear limited but the benefits are great to the whole worl population. Anyone who has seen a doctor is the beneficaiary of this application - that would include most of the world population.
This appliance can help "computerize" a very important but primitive industry - healthcare.
The appliance has attempted to make the overly complex installation of openemr a no brainer for most people (esp doctors) and enormously lowered the barriers to entry. A reasonably computer literate doctor can take this on and be up and running in a few minutes.
Without the appliance it would take hours to configure the various Open source components that comprise the openemr solution including
Apache, MySQL, PostgreSQL, Perl, PHP, Sql-ledger with hooks from one to the other - bootm line it was a nightmarish balancing act.