Should NX be upgrade-able like a PC?

[Soundwave]

Yes it should be upgradable, in a very simple plug and play way like the Supplemental Computing Device patent (SCD).

Base Console NX -
2.5 TFLOP 14nm AMD
10GB RAM
$299.99 Fall 2016

NX SDC -
Adds second GPU, doubles compute performance to around 4.8 TFLOP
4K output
$149.99, 2017 release

NX Portable
- 600-700 GFLOP portable
Can dock with NX SDC to have console quality graphics at home
No need to purchase both NX Portable + Console
$249.99

Basically in this setup you don't have to pay $250 + $300 if you have the portable and want the console too (costing $550). You could buy the portable and just get the SCD for $400 total.