Very interesting development. I wonder if they're going to create or adapt an office suite to go along, especially one that integrates email and calendar support. One that integrates with Android, as well. That might make a critical difference.
I also wonder if Google will branch out, yet again, into offering enterprise support for Chrome in the workplace. That would really shake things up.
A side benefit is that hardware manufacturers might start taking *nix drivers seriously.
Microsoft might sleep well tonight, but the heat will go up increasingly over the next couple of years. They better pray that Windows 7 is received better than Vista. Otherwise, their only option might be to finally dump the legacy code and migrate to a GUI on top of a *nix to stay afloat.