Why?  I've been doing the majority of my bitcoin transactions on my android phone for well over a year now.  The times that I have to type in the addresses (as opposed to just using the camera as a scanner) is somewhat annoying, but I'm confident some kind of standard will emerge there as well, in time.  It's certainly no more difficult to type in an address string to buy something online at some new to me website than it is to buy something online using bitcoin; and that's also bound to get easier once browser linked wallet clients become trustworthy.  I've been on commerce sites that buying with bitcoin was almost, but not quite "one click simple".  I've scanned QR codes right off my monitor, and never even fired up my destop bitcoin client.  In fact, my desktop client is hardly even used at all, these days.  I'd be just as well to move those funds into cold storage.  I'll admit that I still do the majority of my online buying using other methods than bitcoin, but that's likely to shift significantly if Amazon ever develops a payment method compatible with bitcoin.