When they first announced this back in 2008 I was completely on board with the idea. Since I live in the arse-end of the world with no friends into "nerd stuff" nor anywhere that sells D&D stuff for miles this would have finally been my chance to get into the game. Then it got delayed, again, and again. I wouldn't have minded the Insider sub fee for the table but everything we were given to tide us over was useless to me and simply not worth it. Soon it seemed they completely dropped this.
In the mean time however I found MapTools. A program that does exactly the same thing, for free, and can easily be used for any edition. I've recently started playing a few games with it and loving it. So why would I suddenly want to start paying a subscription for a program tied to a specific edition which will be dropped in a couple of years in favor of 5th?
Sorry WotC, 4 years ago I was jamming my money at the screen and you didn't want my custom, now that I've started flirting with other, better programs you've decided I'm finally good enough? Ain't good enough.