There are many people that prefer to have something "physical" - a DVD, a CD, whatever.
Not everyone likes the idea of these concepts.
Take Steam and the whole drm discussion as an example.

"The point is: As you can see right now - publishers more and more develop for consoles and not publish on pc or release it much later."

Imo thatīs nothing to worry about:
http://www.teut.net/Web-Site/Teut%20Talks_files/Der_5_Jahreszyklus_en.pdf


no science involved