Just to speculate a little bit further, actually we do not know anything about the Switch 2 new Dock.
This time it could include extra chips, NVIDIA tensor cores or whaterver to boost performance/visual quality for TV mode in order to have a graphics quality in line with the current gen.
I'm just speculating, but let think about it, Nintendo could even launch two Switch 2 models: one without the Dock at a lower price and a full-package including console+dock at an higher price.