It is really fat: about 14mm, nearly twice as thick as most current phones.
Although the display is bigger on this Pro1X, I don't think it would be that uncomfortable to use, as the times of being able to grip the phone by both sides with one hand are long past. The way I hold them now is by having 4 fingers behind and praying it doesn't slip, I guess.
It couldn't be that thick phones are heavier to carry around. The difference between a 8mm phone and a 16mm phone couldn't be more than 200 grams or so. That's making you sweat as you carry it? It couldn't be that it's tough to hold up to your ear. My Nokia 7210 was probably one of my best phones ever and it was by today's standards a thick brick. Google tells me it was a whopping 17.5mm thick. So what is it? What practical benefit do you get from a thin phone? The only thing I can think of is the ability to carry it stealthily in your pocket, but is that really the driving use case?
Then again, if you're always holding it with two hands, who needs a case, right? :þ
It's thin, light, when inflated it provides excellent protection, why doesn't everyone carry their phones in a sandwich bag?
edit: this thing looks like a total scam. Announced as being 12 weeks out in 2015, taking orders, and still not released in April 2021, yet still taking orders? That's more than a blown deadline at this point. They're lucky they haven't seen legal action.