Syncaine's theory involves rabid mobs of WoW players buying new MMOs, driving up expectations and fanfaire about the game, then leaving in droves never having had intentions of staying in the first place. His theory states that the players are, unintentionally or not, destroying these other MMOs. I've written responses to his theory, which I find to be completely without merit, but no response I've written is anywhere near as succinct and thorough as what I just read from Sayla. Those market forces I've written about previously are all summed up quite nicely.
In short:
You’ll need to do it DIFFERENT or BETTER than, where I’ve been before.