The depletion of the IANA IPv4 address pool is not a crisis. Next week the Internet will not be significantly different that it was a week ago. There will not be any notable short-term effects caused by the empty IANA IPv4 address pool.
There is no crisis, but there is a need for action so that the Internet can continue to grow. The transition to IPv6 requires the attention of many actors.
Russ Housley on Final IPv4 Unicast Address Allocations
Russ Housley has been the IETF Chair since March 2007.
For those interested in IPv4 allocation, the IANA IPv4 Address Space Registry is an interesting read.