It might have actually made it another year or two, or even further than that. Think about it, PCs aren’t really appealing to the Teenager/Child market, to most it would seem too expensive and too complicated, so if LU was on, say, the XBOX 360, a larger audience would be captivated, and a lot of people would have played it.
Also porting a MMO to the Phone or Tablet would have not been a choice because, firstly, MMOs aren’t built around handhelds, but PCs. When was the last time you saw a true MMO on the Phone/Tablet? Secondly, the Phone/Tablet gaming audience is very casual, LU would have shut down much earlier as barely any Phone/Tablet gamers I know of are interested in MMOs.
My Opinion anyway.