Stadia in general, will most probably be more expensive (than native console playing) if they plan on generating positive margin.
- More hardware is needed, as there is hardware in the datacenter and you'll have either have an existing piece of equipment or buy (thin client) to play games.
- More electricity is being used as you have more hardware to power.
- Vastly more internet bandwidth is used.... on both ends.
- The hardware located in the datacenter costs more to house per square foot than your home.
- You are now paying someone to maintain your console in a datacenter.
Even, if Google is generating their own electricity and is getting government kickbacks, I would imagine the electricity usage on both ends will make that a negative.