Noll on 06 October 2014
If they make two different consoles (a portable and a home one) with a SHARED library (meaning, I'll have a single account that shares games between the two consoles, and a CLOUD saving system, meaning I can play the same game with the same savefile on both at any time), that will definitely incentive me to buy both.
But this is a wish that will never come true.
If they were to add this, I guess two different people could share the same library on different devices.
Still, it will be GREAT.
Otherwise, they could sell the home-console as an upgrade kit for the mobile console.
Finally, they could sell both as a single system (like someone already said).
