this will take years to develop ....
mp3 players had been around for ages and no one was buying them.. then apple came along and changed everything overnight.
Seriously, it's only going to take an easy to use smartphone app to go viral to send bitcoin skywards. As long as it checks the market, uses a barcode scanner, has a secure wallet, and is fast, we will have a useful ninja currency.
this could do it for bitcoin, and it could do it overnight