Well, isn't that part of the reason for the SRD and the edition change in the first place? It allowed WotC to pick the brains of the competition for free (since rules based on the SRD are pretty much the property of WotC, thanks to the very hazy wording of IP in the SRD concept), and see what new system ideas could come up .... and then, by switching editions, they can really put a spoke in the wheel of the competition.
Yes, I know all the stuff about how they did it for the good of the hobby, blah blah blah. The truth of the matter is that they're a business, out to make money, and if a business has the chance -- whether by accident or design -- to torpedo a good portion of their competitors, who were foolish enough to place themselves and their product lines at the mercy of the 'industry leader,' I doubt that too many business decision-makers are going to flinch at pushing that button and sending the 'torpedo away.'
If this kills half the industry, WotC will smile. Just like the small presses would if they could kill WotC and take its stuff. Except that WotC has the power and the opportunity. At best, they just aren't going to give a dang what happens to the ones riding on their coat-tails; at worst, they're giggling hysterically at the thought of getting their foot firmly on the neck of the competition.