did you check out the page? this features a "flying mode" in 3D terrain, streamable to Vision Pro
FSX from 2006 had 3D terrain you could fly over and streaming to a VR headset isn’t that hard either. An oculus Quest has effectively mobile phone power and can run VR games on device.
It's still doing nothing that a 20 year old flight simulator wouldn't be able to do. The one potential performance problem on a laptop with HighDPI display might be the pixel fillrate to render at full resolution, but the pixel shaders in Google Earth should be extremely cheap, and if that's not enough it could drop down to half resolution with 4x MSAA without much quality loss (but an M1 GPU easily has enough oompfh per pixel on a Retina display for what Google Earth needs to render).