It's a really hard thing to discuss with lots of sides to it.
1. Traditional publishing still brings money in to writers of a certain demograph. Do you think Andy Weir, Hugh Howey and their ilk would have switched to trad from self if they weren't earning more from that model?
And herein lies the problem with successful self publishing. It takes time. Loads and loads of it. To promote, to get the books out, to do your kindle deals, to find editors and cover art and all those things. (I'm hybrid, by the way, a bit of both - one self published book takes as much of my time as two trad...). More and more of the self publishers I know, who've done well, are seeking a traditional deal because they have no time to write. And without more material, their income goes (and remember the self publishing model is greedy for new material. I used to be a blast-it-out writer. Now I'm slower. Why? Because I have so much to do over and above writing. Since the books coming out I despair of finding enough time to write.)
2. Are bookstores dead? No, definitely not. It's always been a tough business to turn a profit in. Margins are, for retail, low especiallly for stores like WH Smith where they do magazines which eat profit margins for breakfast (I used to be a manager in the Irish equivalent of Smiths). Waterstones have turned much of the deficit around and do look to have a sustainable business model in place.
So, here we have a blog with an agenda - to claim all is fine with self publishing and its the way we should all go to make money (and fails to mention that the vast majority of self publishers make nothing at all) - disputing a newspaper article with an agenda (that traditional publishing is back and the e-malarky was all a flash in the pan)
The truth lies somewhere in the middle I think and more and more authors are doing what I have and combining trad and self publishing according to the project.