Comment Re:How much effort is needed by the developer now? (Score 1) 150
Porting is a lot more than graphics. If you can change to Linux audio/keyboard/mouse support or screen/viewport configurations by the click of a button, I want that button.
Get Unity 4 when it comes out, and you will have that button. Unity abstracts all of what you listed, so you won't have to deal with any of it when developing games in Unity.