Salesforce recently released the Salesforce App Cloud: http://www.salesforce.com/uk/platform/overview/ & https://www.salesforce.com/blog/2015/09/salesforce-app-cloud.html.
I am a bit confused and unclear as to what the Salesforce App Cloud exactly is and how it differs to the Force.com PaaS offering.
As per https://www.salesforce.com/paas/overview/, "The App Cloud brings together the power of Force.com and Heroku into one family of services to give you the most complete PaaS tools available".
From that, I am assuming that the Salesforce App Cloud gives one the ability to develop apps aimed at customers super quickly in a wide range of programming languages (Heroku), whilst getting the data from customer interactions integrated closely with the Force.com platform. BTW - this link helped me understand a bit more about the nuances of Heroku and the Force.com platform: https://www.quora.com/What-is-the-difference-between-Force-com-and-Heroku
Is this assumption correct, or is there something else about the Salesforce App Cloud product offering that is really compelling vs the Force.com PaaS?