As mentioned, a mere Solu app will not suffice. It's not just the limitations on AppStore/Play etc, we do actually go down into the kernel level to make this whole model work. Now we could possibly have a virtual desktop environment, but none of those have ever been successful and, I believe, for good reason: the experience is too 'geeky'. You end up having an OS with its oldschool windows which then contain another OS with a completely different model. There is too much mental load and the experience is bad.