All of your examples are casual games.

WoW, Rift, Guild Wars, SC, competitive FPS's, Witcher style RPG's, Elder Scrolls, etc. these are not games you will be playing on a tablet. There exists a clear divide between casual and serious gamers.

I don't mean to imply that there's anything wrong or inherently inferior about the more casual side of things, just that they really are two very different markets.