I think it's inevitable in California, but it may not look anything like Orlando's version. The differences will only be skin deep, though -- most of the stuff they really want will be there.
That's only part of the public face of the system, and one of the easiest features to drop. The system is really about trying to get a statistically significant subset of the visitors to drop a few extra dollars, mostly by studying the usage patterns of large groups and putting things in their path that they're likely to want.
Is Anaheim really losing all that much sleep over resales of multi-day tickets? Enough that they are reconfiguring the entry gates, adding paid staff hours, and slowing down guests on their way into the park, wallets in hand? I think that whole photo-process they're adding at the gates is just a cover: create the perception of a problem and a solution that's inconvenient for guests. After about 6-12 months, guess what? They've come up with a new "SmarTicket" plan that uses a chip (none of that evil RFID stuff, you see, just a chip) embedded right in the ticket, just like they do in all kinds of places in Europe & Asia. Pretty soon, they've replaced all the ticket media with something that's almost as trackable as the bracelet.
Since most guests pay for their tickets with a credit card, they'll be able to link each group of tickets to a household (they just won't have direct access to the demographics of the household, but they can buy that). For AP's & resort guests, they'll have the demographics from those systems. There's a small number of people who will use multiple cards while visiting -- they can tie some of those to tickets, but it's not reliable. Anyone using cash will be mostly untrackable via the tickets, but that's probably not statistically significant.
But to the public, it won't be NextGen: there's no bracelets, no pre-planning web applications to sign up for, and probably no WiFi access either, for the time being -- by itself that will make SmarTicket so much cheaper than NextGen that they won't feel the need to discuss the budget publicly.