I knew I had seen a tablet shaped similarly before.
It was the Pepper Pad:
I am not a fan of flared edges.
Previously at Mike Cane’s Blog:
Update: See some of the Pepper Pad in video after the break.
You can see in some respects they were ahead of their time. But the device in practice was buggy as hell and they never seemed to have adequate manpower to address both that and the ambitious updates — as seen above — they wanted to deploy.