I need clothes and I enjoy books and watches, amongst other thing. They fulfil necessity and bring me pleasure that no amount of emptiness or self-denial can replace. So I won't be doing this or anything like this.
Good luck with it, though, if it floats your boat.
On reading the blog I see that he is not being literal. I think his principle is a fair and good one but I think self-discipline is more important than a rejection of consumerism (and, to be fair, he is in effect advocating an improvement in self-discipline).
I strongly agree with this other article he wrote about self-discipline: Wise People Have Rules For Themselves.