What is design thinking?

At the ELKOM fair last week in the luxury electronics seminar, we briefly entered into a discussion about the role of design in technology. I tried to make the point that design is not fundamentally different from engineering and both could be considered as a constrained optimization problem. The gentleman from Vertu emphasized that it is important not to solve a very narrow design problem that may not generalize very well.

Here is a TED talk I watched in which the speaker attempts to describe the kinds of principles that go into innovative designs and urges designers to think big.