If you want to see just how irrelevant E-Commerce is, just look at your neighborhood Apple Store. Their products are the sort that could easily be purchased online -- commodity technology products aimed at the supposedly tech savvy.
The only visible effect of e-commerce has been the thinning of margins. The ability to check prices online leveled the playing field between retailers and customers. This has brought us closer to a real market -- one where perfect information is available to all parties.