On the server side I'm hardly believe that a SOA like architecture will be largely used. I'm biased because I'm the author of an ESB like systems for working with services even simpler: https://github.com/salboaie/SwarmESB.

The core concept for SwarmESB I call "swarming" that is a method to compose API's in a distributed system. Swarming can be for SOA's orchestration what REST is for SOAP. Introduction: http://www.slideshare.net/salboaie/swarms-introduction