I'm more interested in battery life instead of raw power.
It have been my biggest disappointment with all recent Nintendo handhelds since the DS Lite which had great battery life. Since then it seems to not be as relevant of a metric. Currently one pretty much need to play next to a power outlet.
Hopefully if the concept is just an upgrade to what switch is they can use the dock to improve performance a lot compared to handheld mode. Making it not feel underwhelming as home console or as a handheld.