Mercedes EXT 92.

Yes, in the year 1992 Mercedes showed concept truck. It had siding doors, driver in the center, aerodynamic connection between truck and the trailer, convex trailer front, minimalistic dashboard with touchscreen, xenon headlamps, led turn signals and rear lamps, radar, cameras front and back. The list is very long. They went so far that the trailer was pulled towards the cab at higher speeds to reduce drag.
https://www.youtube.com/watch?...

I think trucks with similar features designed by Luigi Colani are even older.

Powertrain you say? Leyland showed truck with gas turbine in in 1968. But this is even older. Ford made "Big Red" gas turbine truck in 1964.

Why are we still looking at the concepts when most of the technology existed at least 20 years ago?

Are you sure that they have all that income from MAC sales? I can believe that DELL has, but definitely not apple.

So far it was well known that they almost went bankrupt selling computers and they survived on iPods and iTunes. And now they are mostly phone seller.

Actually there was article recently (unfortunately I don't remember where) saying that they just made more selling iPads than all MAC models combined.

I can agree on everything apple is, but not a successful computer manufacturer/seller.