This appears to be from 2011. Must not have panned out. I noticed that they were concentrating on running apps and didn't get into phone capabilities such as dialing, receiving calls, etc. Likely would need dual sims...
GPS for both might also be an issue.
I could also see this being used in other fields (such as military) where there would be advantages to isolating important applications in their own OS environment and being able to have another that would act as normal android (web browsing, communications, smaller apps).