What factors are pushing organizations to adopt serviceoriented architectures,

What factors are pushing organizations to adopt serviceoriented architectures,
What factors are pushing organizations to adopt serviceoriented architectures, and what factors are holding them back? Considering these factors, do you believe that SOA will be adopted, but slowly; that SOA will be adopted rapidly; or that SOA will disappear as another good idea that simply costs too much?

What factors are pushing organizations to adopt serviceoriented architectures,