Miyamotoo,
Nintendo can't want making a portable with powerful.... Tegra X1 need 20 watts for 1 TFLOPS... So battery life will be 1 or 2 hours and that's nice to make a other Samsung note 7... Don't forget Nintendo's audience > young public and family....
Why trying to port home games on handheld ? When it's easy to make a home console whose accepting HC and HH games... ?
What is the biggest problème for Nintendo ? Having à lot of games on portable or home console ?
I think home console NX and portable NX will use the same OS, not to have the same games but to have a lots of features together, and if you don't like playing on handheld, you will have its games on home console...