I think the steam is going to make tennis easier to play for the average player but it won't make it on the pro tour.
This "sling shot" effect I think will work on topspin very well.
As you slice the ball it will sort of "shoot" the ball out.
Basically you won't have to swing all that hard for any stroke and just let the strings do the work for you.
It's not a serious players stick. In the right hands however like a santoro it could be deadly.
"Federer has to beat Nadal(if he wants) to be considered the greatest ever, certainly in my book." Pete Sampras