When I saw Razer Edge for the first time i was so excited about possibility of running windows games on the go. My dreams crashed on hard surface of reality when I saw Egde's price tag. Since that moment I am looking for decent alternative. I mainly think about tablets with AMD APU, because...
You could try Touchpad app - it turns your smartphone/tablet into wireless touchpad with gesture scroll, screen keyboard and multimedia buttons features.
https://play.google.com/store/apps/details?id=com.thingsstuff.touchpad