I read about the changes the other day. For me, I think that this is a smart move for Verizon to do (and apparently, it looks as though AT&T is making the same adjustments).
One of the problems that I have (being a Verizon customer) is that because my wife and I have Blackberry's, we are not eligible for the Connect or Premier plans that many people have talked about. In fact, neither are Android phone users. So, I have been having to pay for data on my phones for a while now (Blackberry, like iPhone, requires a data plan). Currently, we are on the select plan which gives us unlimited text, but we have to get data plans for the phones. From the high end of the spectrum, this change allows for me to get unlimited talk + text for approximately $15 more than what I am currently paying today for 1400 minutes whereas, previously, it would cost me over $100 more. So, there is the immediate benefit for me should I choose to go with that plan.
The proposed metered billing model for data, however, is a concern for me. The reason is because it has the potential to hurt users of certain smart phones over others, creating an unfair billing situation. For example, with my present situation (two Blackberry's), metered billing would work in my favor. This is because unlike iPhones and Androids, Blackberry's do not directly access the internet. Rather, they go through BIS servers (which are operated by the carrier and RIM. Even BES activated phones go through BIS to get to BES). These servers act like a compression proxy for data, compressing everything that gets sent to the Blackberry. It even limits the amount of data a Blackberry can download at any one time (you cannot download anything larger than a 3MB file for most carriers). Thus, much of the data traffic on those phones are small. I use my Blackberry for business and my wife as a personal phone and combined, we do not even use 50MB of bandwidth a month (even though we pay over $75 per month for enterprise and personal unlimited data). However, I also have an iPhone on AT&T. iPhones directly access the internet without compression. For the same month, I can consume several hundred MB of data (in some cases, in the GB range) for the exact same amount of use.
By Verizon's metered logic, for the same type of usage, I would pay several times more money for a device like the iPhone (Droid would be a good example here) than I would for a Blackberry, only because the Blackberry uses data differently, not because my habits are different.