Lots of people called it SaaS-enablement, some call it SaaS-ification of software. Whatever you call it, more and more enterprises are looking to turn some enterprise application into a SaaS cloud application.
There are several reasons to SaaS-enable an internal application. Enterprises need to expose a software system to their partners and/or customers to better automate the business. Or, they are looking to monetize applications they view as having value to other companies.