I agree that there's holes in it, it's written in that didactic way that 'comment' pieces are written, and that the Hipster doesn't exist in the bald way portrayed, but I think the points it makes about the flight to irony and the problems with it, are pretty on-point. So I guess for me, the article might've been better ditching the hipster conceit and talking more generally about irony, which it does attempt to do part-way through I think.
Also, I don't read enough innovative things in newspapers to mind when good points are being re-made - they bear repeating in this case I think.