The fact that the Echo has no screen really forced Amazon to make everything work with voice only. HOPEFULLY the same will happen with this thing. It's the #1 thing that keeps me from using Siri beyond very simple things. As long as I have to keep looking at the screen, I might as well touch the screen.
Yeah about that, I'm afraid not for much longer...
http://www.aftvnews.com/amazon-echo-with-built-in-screen-rumored-to-launch-next-month/
But considering Alexa seems to be getting built into everything from a toothbrush to a cooker (not quite but you get my point) then why not stick a screen on the Echo?