Boy, does this emailer know how to title his email!
What you are asking is ‘Is the future of WoW mobile?” or “Is the future of the mobile market in WoW’s future?”
Blizzard is primarily a PC game company. Smartphones are mobile PCs. Also, Blizzard loves releasing its games the same day on the Mac (you know those crazy artists love their Macs). We’ve seen Blizzard already has made a mobile app for smartphones that include guild chat and the auction house.
It is highly probable that pet battles and other mini-games Blizzard wants to include in WoW (pet battles is the first one) will make it to the smartphones.
As for raiding on a smartphone, I don’t think that will occur anytime soon. It just isn’t possible with the lack of a user interface a smartphone has.
Selling WoW’s minigames on smartphones would be a good way for Blizzard to not only make more money in a different market (while not doing much additional work in art and programming development), it would also allow them to lead a trail of breadcrumbs to WoW. Someone might buy Pet Battles for the smartphone, really like it, and then investigate to see what this ‘World of Warcraft’ is all about. After all, WoW has the pet battles the person loves! If WoW sucked, they think, at least they can do their pet battles on the home computer.
I don’t think Blizzard is ever interested in doing small smartphone games. However, they would do smartphone apps that would tie into their flagship products. For example, a small game using the Starcraft 2 engine (a turn based game?) could be developed by the modders at Blizzard for the smartphone which would be a marketing exercise to lead consumers to the main PC game.