This “center stack” of dashboard controls looks pretty cool. It’s from a Volvo. (I can tell by the typeface.)
Design mistake? When you’re driving down the road at 75 miles an hour (120 kph), the last thing you want to do is take your eyes off the road long enough to figure out which button you need to push to make the hot air go to your feet rather than at your face.
Takeaway? When you’re designing that thing — or planning that speech — go for what will serve the user best rather than what causes the biggest wow. (But be sure to leave enough wow in to make it exciting!)