I would expect nothing from WOTC on this, for a couple of reasons:
1) Their move did *nothing* to prevent PDFs of their products from showing up on various pirate sites. Copies still appear, but they're scanned instead of purchased PDFs, and take a few days longer to appear -- but that's been the only effect of their cunning plan.
2) The lawsuit they filed against the folks who had distributed pirated copies of PHB2 was able to be brought because they were able to identify those users through existing security methods. In other words, watermarking and steganography WORKED, and provided the needed info to the publisher. So to turn around and claim that they were pulling PDFs to "combat piracy" was... an odd choice, to put it kindly.
You're looking at a lawyer-derived policy, made by folks with a) little connection to the products themselves and b) even less connection to the community.
It won't change, and you won't see any true alternatives. What you will see is something completely different, with none of the same functionality, touted as a valid replacement.