I forget where I saw it earlier this week, but someone from Google says there will be over one billion mobile devices (phones and tablets) powered by Android next year at that time. So, yes, the potential and the opportunities are very rich and hopefully we will all end up that way too
I don’t think getting rich by Android apps is for everyone. My guess is that for every success story there are at least 100 people that did not make any significant revenue. That’s ok as long as you enjoy making apps.