As you may know, the number of available IP version 4 numbers are rapidly approaching zero. Some estimates that there is less than one year until the numbers run out. The American Registry for Internet Numbers (ARIN) have produced presentation material that can be used to spread the word about this issue. I would recommend you to influence your local internet service provider to take action to use IP version 6 if it is not already in place.
For an application developer involved in programming for communications over the wire, the future will most certainly contain requirements on software to be able to work over both IP v4 and v6. If you are into Boost; The Boost::Asio library provides a nice interface which is transparent with regards to what version of IP is used. The class boost::asio::ip::address implements version-independent IP addresses.
Here are some articles from elsewhere on this issue:
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