If only, I have been using Linux (mostly Ubuntu) since 6.06, but I can't get the rest of my family to use it. My wife needs Microsoft Office for dealings with the school district that requires it (she is a teacher) and Girl scouts also require it (she is a troop leader). My son can't play a lot of his games on it. My daughter used it for a while, but got tired of fighting the occasional program that would only run in windows. Also, commonly school wants homework done with Microsoft Office, although they are starting to use Open Office more.
Until (most) all the software companies embrace Linux, it will never be a real alternative.