While its physical incarnation isn't very clear, it is said to enable some functional expansion by way of hardware modules. (androidcentral.com)
Obviously, the former is much more secure, but the latter was years ahead and stands to catch up with the addition of a few hardware modules. (android.gadgethacks.com)
The platform will also need designers to develop hardware modules as fast as how quickly software developers can create new apps. (techtimes.com)