SpaceX has way more satellites in orbit than the rest of the world combined, so maybe we know a thing or two about the subject 🤣
Starlink V3 will be 20kW and launched at scale around Q4 next year. No problem to scale that to >100kW if the satellite mass is shifted towards solar arrays and radiators for AI compute, instead of giant phased array antennas for Internet connectivity.
As you mention, it would use the same laser comms system as Starlink to connect to Starlink.
An AI satellite is easier, not harder, than the Starlink V3 design, which is a marvel of engineering created by an epic team of humans. I am so proud of the @SpaceX team.