Whatever is being denied you can count on the opposite being true.
Well they're doing the opposite of denial here: basically claiming that Windows 10 Mobile is finished, so what to make of that? Certainly, there's still lots of multiply-sourced rumours concerning Microsoft's hardware division, Qualcomm, the Snapdragon 835, and x86 emulation that need to be resolved.
My feeling is that Windows 10 Mobile is "dead" simply because the regular Windows 10 build is going to extend to portable, ARM-based, LTE-connected devices, with third-party Win32 app support through emulation. If it does that, there's really not much else that's unique to the "Mobile" branch of the OS except voice calls, which just an app.