Currently, (Sept 2015) you can use DPS 2015 to create apps for iPad and iPhone, Android phones and tablets and Windows 8.1. Later this fall we will extend this to allow you to create Web apps that work in a browser. This is available today in the DPS classic platform.
Thank you to everyone for all of the helpful advice this gives me quite a few options to discuss on what we should do in our current situation which puts me in a much better spot than I was in yesterday.
Yes, you could potentially create a separate Classic DPS application as a web-viewer only app and use DPS 2015 for your native app experiences. Assuming that by "interactions" you're referring to InDesign overlays (using the InDesign DPS plugin) like slideshow and video, DPS Classic supports them too.
You could have a Classic DPS folio for each each DPS 2015 collection.
As Ivan mentions, DPS 2015 is targeting a web viewer for release in the fall.
So would we build it out in 2015 and then just create a single folio with all of the articles in it for 2014 and push that out to create the web version just so that we have a web view of it without the interactions?