I have a few concerns with this and I don't know if anyone else has mentioned these because I skipped to the last page (I'm at work and don't have the time to read all the pages..LOL! SHHH!!

) and here they are:
1. Are they gonna raise the prices, AGAIN, to have these wristbands?? Or is it going to be cheaper for us?? I can't imagine them being cheap, so does that mean that we have to pay for them since this is what Disney decided to do?
This is Disney - do you really need to ask?
Disney will raise prices every year, regardless of whether the wristbands save or cost them money. They'll raise them as high as they possibly can, until they find that sweet spot between squeezing every dollar they can out of you, and actively driving you to their competitors. *cough*Universal*cough*
2. What sizes are the gonna make them in? With little kids, especially, they tend to not wear things on their wrist sometimes and/or babies like to try and tear them off. While I'll admit it may keep them busy in the strollers (LOL

), they aren't going to like it too much. What happens if they do take them off and throw it down or tear it? Will the parents have to pay for another one?
'
Since the bracelets only hold an ID code, not any actual information, I'm going to hazard a guess that replacing them at Guest Services will be simple, and not something they would charge for.
In fact, bracelets will likely be even easier to replace than tickets, since your information is already in Disney's computer systems. The only trick will be deactivating the bracelet as soon as you report it lost, so no one else can use it to charge items to your credit card.
Babies and toddlers obviously wouldn't have charging privileges on their bracelet.
Bonus - bracelets will probably be harder to counterfeit, since they each have a unique code connecting to a specific guest in the system.
3. Just how much more information does Disney need from us? With the amount of FPs taken everyday and the finger scans, and the tickets, the resort rooms being booked, what other information do they need?
I wouldn't think they'd need any additional information, beyond what they already have. The bracelets would only contain an ID code, connecting you to a central databank.
However, from what I understand, Disney has several different computer systems running simultaneously, not all of which talk to each other and some of which are badly outdated. (Which is why Disney billing thought we lived in Switzerland, while the reservations system was well aware we're in Canada, and why Magical Express assures me we're in their system, even if it doesn't show on the Disney website.) I'm guessing a big goal of all these changes is getting everything under one big umbrella, to simplify access to data.
4. How durable are these going to be?? Will they survive the pools, showers, rain, or any other kind of liquid substance that may get on them?
I'm sure I have a few more to ask, but I gotta get back to work
I'm guessing very, very durable, and designed to be worn in the pool/waterparks. It'll make a nice souvenir of your trip.
Added bonus - no more accidental demagnetization of room keys, because you absentmindedly stuck them in your wallet next to your credit cards!