SaaS as a Disruptive Technology?
At long last I've finally got the report I produced with Dr Steve Moxey of Manchester Business School published on MSDN.
In short the report concludes that SaaS as a general concept is being seen as a "radical incremental technology" more than being "disruptive" which makes sense given that SaaS as an architectural pattern builds on existing architectural patterns such as SOA. That said, although the approach is itself "incremental" it will still depend on the individual scenario as to whether that will be disruptive or not.
The framework below describes the approach we took in workshops with software vendors that's proved a useful tool in understanding one's own particular market.