Haven't seen a topic/page with data for this yet. There's this:
https://www.scirra.com/manual/6/system-requirements
But it refers to the editor and not games created with it.
Node-webkit minimum requirements? Is it Windows XP SP3? It doesn't need DirectX does it? How much memory does it use (not including the game)?
Develop games in your browser. Powerful, performant & highly capable.
Well the parts about a HTML5 capable browser with latest graphics card drivers applies.
Node-webkit is the same as Chrome, which is XP SP3+ I believe.