DocBook and DITA Editors: Is Their Future Online?

Thanks to my Google News Alert service, I recently discovered some on-demand XML Editors supporing DITA. While Salesforce democratized software on-demand in the CRM market, I am still perplexed on the future of on-demand pure play software. So let's see first what makes on-demand software, also known as Saas (Software as a Service), so attractive nowadays. I see five compelling reasons.

Talbot, Fabrice. LiveTechDocs (2008). Articles>Information Design>Software>DITA