] After spending an evening and morning with the Gnome
] 2.2-based Java Desktop System, I can report that Sun has
] what appears to me to be the most polished and real-world
] user-ready Linux desktop in existence.

The pricing is interesting. As a home user I don't want to pay that much recurring, but on the other hand I think it makes sense for software like this to be sold based on a recurring service model.

Sun's Desktop for Linux - Sneak Peak