Yes, there will be Carrier Grade NAT (CGN) used for the time to be. You will primarily see if in Mobile Wireless networks for handsets that don't require a full Internet connection but other ISP's will eventually be forced to do the same. That said, CGN is required so that we can do Dual Stack (where you have both an IPv4 and IPv6 address). This is the most commonly accepted transition technique and really the best available. It works by using the DNS system to determine if the name you are trying to resolve has a AAA or AAAA (referred to as a Quad A) record. The IP stacks of today are set to prefer Quad A over AAA records so if a site has a IPv6 address (or Quad A record) you will hit the site using your IPv6 connection. CGN is a IPv4 technology and not a IPv4 to IPv6 Gateway. CGN just allows us to do a massive amount of NAT44 that most of our current NAT devices can't handle.
Really there is nothing to see here that hasn't been said over and over again on every "World ending IPv4 shortage" article on Slashdot. Yes, the threat is real. Does it really matter to many people outside of Service Providers, not really because almost everyone else is doing NAT44 today anyone in one form or another. As usual, what should be taken from this is that if you are a Network Engineer responsible for managing a network, you should be taking the time to take inventory of your IPv4 space and making plans for implementing Dual stack in the near future.