The pundits are still debating whether SOA lives or is already dead. See Joe McKendrick:
Joe McKendrick asks: "SOA targets the business, but is the business sold on SOA?".
“Many of them had deployed multiple successful projects, but most of those projects were focused on just one integration problem,” Manes said. “It was just a bunch of Web services. … The service is only built for one application and it’s never going to be used again.”
Maybe it's sometimes just a question of will.