Two separate screens would still allow great multitasking when necessary. When not used perhaps it can completely fold behind the device for a traditional smartphone experience.
I don’t think most people want to multitask - the want one big app or video.
Honestly I don't know why it exists. You could just buy a case and then buy two phones.
A two-screen smartphone is something I'd love to have, if bendable screen smartphones end up tanking. Multi-tasking is something that would be so much more convenient (say, writing notes while looking at a certain website, or discussing something with a friend while referencing a website, or ... etc). These are things that I already do with my smartphone, but it's just a huge pain in the ass because of the single screen.
https://www.engadget.com/2011/02/07/sprints-kyocera-echo-dua...
...I wonder if a triptych of three screens would work better...
By most accounts its a brilliant device. If it came with a stylus like the Note or the old Psion 5, I would probably have bought one already.
I'd never buy one because they just aren't going to be as good at security as Google or Apple, but the design is good.