The point is until everyone moves to IPv6, the rest of us are stuck having to support dual stack - which is expensive (see the recent story about an ISP supporting a tribal reservation who had to spend an extra $300k and wait 11 months to support legacy IP) and introduces complexity/risk.

For a small network it makes no difference, everything is auto configured, mdns is used to lookup names, you can makes your hosts ::1 ::2 etc if you want to. Many ISPs around the world provide IPv6 by default, and users are using it without even realising, so it is being adopted just not fast enough. Global usage is around 42% based on published stats, and is well over 50% in many countries, as high as 80% in some.

IPv6 does provide benefits to end users, it reduces cost for the ISP and makes end to end connectivity viable which opens up a whole new set of opportunities. End to end is immensely beneficial for gaming, voip etc. Having everything centralised because users are encumbered by NAT is a big problem - increased latency, high costs (recouped from the users somehow - eg selling their data), single point of failure, applications which become useless once the central servers are shut down etc.