I installed Google Earth on my Windows 8.1 preview laptop and it just hangs or crashes at the startup. Running the Windows troubleshooter says it is incompatible with Windows 8.1.
I've also tried running in compatibility mode and as an admin, but neither work.
Update: Now running Windows 8.1 RTM and it doesn't work on that platform either.
Update2: I now have a new laptop which has the Intel HD display adapter and Google Earth works just fine on Windows 8.1. So I'm thinking this is only a problem with NVidia display adapters and Windows 8.1.