No, the concept is not there AT ALL. HP is very far from providing a truly portable PC inside a phone body.
1. it's HUGE for a phone
2. it emulates the desktop programs on a server, so that requires a constant internet connection. AND it will stop working once the server is down. It's not a feature, it's a service that comes with it, and once HP decides to stop maintaining those servers, the functionality will disappear.
3. EVEN IF they tried to emulate software natively, it would be painfully slow. Because x86 processor architecture is far superior to ARM (the one that smartphones use). And emulation is always slow. Heck, even emulating some 20 years old consoles is a daunting task for many modern computers. Even though they have superior hardware. Now imagine trying to emulate a superior platform on a weaker processor.. It's like doing it the other way around - trying to emulate a modern computer on 20 years old hardware. It just won't happen.
Tell me, where do you see "millions" of Windows Phone users? Because I can't see them. I can only see these 3 persons out of my whole circle of acquaintances who still have their Windows Phone devices just because they can't afford anything better.