Phones are built with profit in mind. Hence their overpriced price tags.
PC parts too have a higher margin for retailer profit.
Consoles are usually sold at a loss, or just breaking even shortly after launch, with slim to no profit margins for the retailers, since the traditional promise is software sales and peripheral cuts. Now whether cards purchased to load into PSN/XBL accounts, etc, will offset physical sales, will remain to be seen. But I suspect that is still very low compared to people who just pop in their credit card or paypal accounts.
DEs are still only at a 10-15% clip of supply vs disc versions according to most estimates. If this redesign rumor is true, then I suspect we will see a bigger shift.
For the record, I have the DE version.