From the Dropbox blog:

With Project Infinite, we’re addressing a major issue our users have asked us to solve. The amount of information being created and shared has exploded, but most people still work on devices with limited storage capacity. While teams can store terabyte upon terabyte in the cloud, most individuals’ laptops can only store a small fraction of that. Getting secure access to all the team’s data usually means jumping over to a web browser, a clunky user experience at best.

Project Infinite will enable users to seamlessly and securely access all their Dropbox files from the desktop, regardless of how much space they have available on their hard drives. Everything in the company’s Dropbox that you’re given access to, whether it’s stored locally or in the cloud, will show up in Dropbox on your desktop. If it’s synced locally, you’ll see the familiar green checkmark, while everything else will have a new cloud icon.

The announcement very specifically mentions laptops and your desktop. No mention of iOS, but perhaps there’s just no sensible path there. Will be interesting to see how that plays out. As currently announced, Project Infinite is for OS X and Windows.

Take a look at the video below to see this concept in action. Note the OS X slight (at about 1:47), as the narrator focuses on Windows, then says, “Ah but graphic design, they’re still on…they always use OS Ten…It works on OS Ten too.”

Clearly a Windows bias there. I’d be surprised if the company didn’t update this video to add a more OS X and iOS spin on things. As is, Apple is merely an afterthought.