We've seen and heard a lot about BlackBerry 10 this week, but if you're a BlackBerry owner excited about the new OS, you're going to have to get ready to invest in a new handset: RIM CEO Thorsten Heins confirmed once again this morning that the company has no upgrade path for existing BlackBerry 7 devices. In fact, the two seemed destined to co-exist: Heins spoke about the new BlackBerry 9220 (and confirmed the existence of the 9320), using their "successful launch" as an example of how RIM is still "onboarding people from featurephones to smartphones," a process that will take the next two years or so. The company seems to see BlackBerry 7 as the OS for its entry-level devices, while BlackBerry 10 will occupy the higher end of the company's range. RIM has promised to upgrade existing PlayBook hardware, but if you're in the market for a BlackBerry you might want to wait and see what BlackBerry 10 brings when it's released later this year.