It was one short week ago that I sat at a convention center in Toronto, watching the new BlackBerry unveil … the new BlackBerry. Much has changed in the intervening seven days, including the very fabric of the mobile landscape itself. How long BlackBerry can maintain the momentum behind its new platform is anyone’s guess, but BB10 impressed enough folks -myself included- to make one thing very apparent: it is, once again, a four-horse race in mobile. The past week has seen us cover the new ...