Next-gen BlackBerry platform to be called BlackBerry 10
RIM"s plans to name its upcoming platform BBX have fallen through because of a certain BASIS International that currently owns the rights to the name who fought for it against RIM in court and managed to prevent RIM from using it.
#BBDevCon Asia Keynote: BlackBerry 10 is the official name of the next generation platform that will power future BlackBerry smartphones!^BZ
Unable to use the BBX name anymore, RIM was forced to choose a different one and so at the BlackBerry DevCon Asia, RIM announced that the platform will now be called BlackBerry 10, which, actually, is nothing more than the full form of the original name B(lack)B(erry)X(10).
As to why RIM chose to jump straight from OS 7 to BlackBerry 10 while skipping 8 and 9 continues to elude mankind.