Eh, not really. IPv4 will be gone. If you are an ISP, and you pursue Carrier Grade NAT (CGN) as your solution, you growth limit yourself. It's equivalent to fixing your available bandwidth permanently - you can't add more customers past a certain point without significantly degrading performance for all customers. In a few years, you'll need to deploy IPv6 anyway; your customers will pay a price for the capital cost of your CGN gear, then your customers will pay a further price for the capital cost of your v6 gear.
If you're only concerned about web+mail, deploy dual stack lite. Browsers and mail clients do IPv6 transparently already. CPE devices support v6 out of the box at the sub-$100 price range (Netcomm, Billion, and, uh, the one used in the big v6 trial by xs4all in the Netherlands). Going DS-Lite means that as more software supports v6, and more services appear on v6, the pressure on your public v4 addresses drops over time. You can sustain DS-Lite throughout transition. The capital cost is similar to CGN, and the ongoing expenses of v6 are generally covered by your existing v4 expenses (ie, bits you pay going over a v6 session are bits you no longer pay for over your v4, and if your upstream is charging you more for v6 it's time to go provider independent!)
Some of the services that don't work over CGN include, by the way, XBox Live, BitTorrent, many network games, and most VOIP solutions. Some services do work over CGN, but rely on a reasonable proportion of Internet users having a public address to do so, and thus aren't long term viable: Skype, some of the smarter BitTorrent clients that do hole punching. Some services rely on emerging protocols for dealing with CGNs, like FaceTime: ICE, STUN, and TURN.
You can get a taste for life under a CGN by configuring your home NAT device to ignore uPnP requests, and disabling any manual forwarding settings.
Also, the summary is full of shit regarding the changing estimation. The linked articles are pretty clear that it's still early 2011. Available metrics (http://www.potaroo.net/tools/ipv4/ is one of the best) show a pretty unchanging date; that link, in fact, includes a few graphs down the bottom showing the change in predicted date over time. If you're an ISP, you've got a reasonably reliable date to plan around, and it should see you unrestricted on your IPv4 clear through to 2012, plenty of time to get ipv6 upstream (typically free or very cheap, when taken alongside your v4) and implement dual stack in your core.