The Future Of 3D In Media Design

It seems that after almost exhausting the uses of the X and Y axis, we are trying to be more creative with the Z axis, especially with websites, applications and other software. We've used simple drop shadows for some time, but nothing that shows a lot of depth. Here are some links to sites that I think show where the future of design is heading on the 3D front:

http://www.whitevoid.com/portfolio.html
http://www.playsmart.jp/
http://www.ecsw.pl/
http://directmotorola.com/hellomoto/razr2/razr2makingof
http://microsites.audi.co.uk/microsites/RS6/index.html#/home/
http://www.nike.com/jumpman23/xx3/
http://www.the-neighbourhood.com/
http://www.cleoag.ru/labs/flex/parkseasons/
http://www.ecodazoo.com/

Looking at these gives me ideas on what i should experiment with in the future, or how i could make these designs even better.

The key attributes that make things appear 3D are:
Shadows
Reflections
Sound
Focus
Object sizes
Distances
Shape
Angles
Colour

Lecture notes: