They could have made the margins with a raised border, like the Kindle, and still had a black border, rectangular with rounded corners, flat back tablet that didn't look quite so much like an iPad.
They could have put their logo in a shallow etching on that margin.
The margin could be plastic, rubber, or any other material more comfortable for grip and/or better for protecting the screen.
They also could easily have the thumb margin on only 1 side, provided their software allows the user to flip the device upside down to switch between left-handed and right-handed users.
They could have put the speakers as a visible part of the top or bottom margin.
They could have the margin be a screen that does not have touch capabilities and is there simply to extend the background color all the way to the edge.
They could design a new battery that would fit around the outer rim of the tablet internally so that the middle of the device could be thinner. This would be technically difficult and expensive though.
Also, simplicity is very obvious when you see it, but before you see it you might not think of reducing things down quite that far. Case in point: Apple's device is not as simple as the one the author at baekdal.com designed because Apple's has a home button, a lock button, and volume buttons. Those are not necessary, but Apple designed them into the iPad.
They could have put their logo in a shallow etching on that margin.
The margin could be plastic, rubber, or any other material more comfortable for grip and/or better for protecting the screen.
They also could easily have the thumb margin on only 1 side, provided their software allows the user to flip the device upside down to switch between left-handed and right-handed users.
They could have put the speakers as a visible part of the top or bottom margin.
They could have the margin be a screen that does not have touch capabilities and is there simply to extend the background color all the way to the edge.
They could design a new battery that would fit around the outer rim of the tablet internally so that the middle of the device could be thinner. This would be technically difficult and expensive though.
Also, simplicity is very obvious when you see it, but before you see it you might not think of reducing things down quite that far. Case in point: Apple's device is not as simple as the one the author at baekdal.com designed because Apple's has a home button, a lock button, and volume buttons. Those are not necessary, but Apple designed them into the iPad.