I wonder if, using a more powerful alternative to the raspberry pi, you can create a mobile gaming pc that can run PS now. It wouldn't be a PS4, but PS3 games would be a nice consolation :)
EDIT: Interesting, this http://www.udoo.org/udoo-x86/ could definitely power a PC running PS Now. So, I can't lug a PS4 around, but I could lug a PS3 around :)
And it would just so happen to have access to the entire library of older systems. Thanks for the idea. I know what my next weekend project will be!