Linux IS a desktop OS.
I don't understand your point. Are you asking someone to make a Linux distribution with a OSX or Windows like user experience? If so, your best bet is to buy one of those operating systems, get proficient at it and be done. Is it because you want Photoshop or Portal on Linux? Let's face it, that isn't happening soon, even if Google, or any other company, decided to make a distribution. There's still too much perceived sunk technical cost invested in the other platforms to make a port in the next several years IMHO.
On the other hand, you could try out the copious distributions that exist and see which one does it best for you. If none of them fit the bill, make your own. It's a glib response, but that's the way Linux works.
