Transport level multihoming

Has anyone here had any discussion about the potential for transport level
multihoming (like SCTP) to replace the current use of globally advertised
multihoming on the Internet?

If the transport pushes multihoming to the end node and IP layer
multihoming not being propagated beyond direct peers.

It would seem that such a system could significantly further the
scalability of the Internet, while increasing the level of flexibility of
multihoming (i.e. if the transport allows adding address to a connection
in progress, this would facilitate mobility).

Here are some links for SCTP, a transport protocol with native multihoming