Technical argument for impossibility of running Continuum on 650 is just a pretense. There are pictures on the web showing Microsoft personnel demoing Continuum on Lumia 735. This means Continuum is perfectly possible on Lumia 650 too. If after that demonstration some changes invalidated the possibility that was real, that’s so unfortunate but I doubt this is the case.
Based on those pictures I am convinced that Continuum on Lumia 735 or Lumia 650 is possible BUT in another extraordinarily shortsighted step, Microsoft denies Continuum on all but the newest height end terminals (for now) only to induce sales for that new expensive phones. This is just another incredible stupid step in what we saw to be ruining any hope for Windows Phone / Mobile to succeed. I wonder who exactly in MS does everything in his power to fail their mobile efforts but he must be someone very high there.
It’s a beautiful phone but the reason makes no sense office and OneDrive integrates on all Windows phones. So if you want a nice sleek metal windows 10 phone that does the job then this is it I guess.