That actually is a great reason for going all digital. The other reason (I don't think it was mentioned in the article) is that over the years (PS2, Xbox, Xbox 360) disc drive failures have been one of the biggest hardware problems I've faced with consoles.

I actually rip digital copies of my kids' DVDs, then stream them to the TV over my network for precisely this reason. Left to their own devices, they will trash any given DVD in under a week.