Microsoft's Joe Belfiore took time from his presumably busy schedule to share a little more on Continuum for phones. Now that Windows 10 for PC is out the gate the focus for the team at Redmond is on the mobile side of the OS.
For a while now, Microsoft has been saying that Continuum for phones requires new hardware. Despite the demos at Build 2015 and speculation to the contrary only newer, high-end phones can second-screen to an external display. In fact, the only reason I am mentioning this is some people who don't follow every drip and drab of Microsoft news may still have questions. Hopefully, this answers them.