Out of the bothering patent war – the most innovative products lately are by Samsung. But all offer round corners – what is state of the art on any mobile product – not just for tablets or smart-phones only. Round corners save mechanical stress. It saved stress before somebody launched any tablet. Just go to your local university and ask what they have been teaching over the last 5, 10 or even 20 years. 20 years ago round corners saved stress potentials.
Sorry, I am wrong. 500+ years ago they told the same. Just visit the museum of science and technology in Paris these days. They show castles and gun towers designed by Leonardo da Vinci – what a surprise: everything has round corners.