I've got high hopes for FFXIV and I'm all for this idea.

I think if they really take some risks like this it has the best chance of being the first MMO in years to be revolutionary instead of a refinement of existing mechanics.

Can't say too much besides that I guess since they've hardly revealed anything - it just seems like they're dedicated to distancing themselves from FFXI. Yes, there are other MMOs coming out (Aion, mostly SWTOR) that will be massive and have amazing production values... But I see those as just refinements of the existing formula. So here's to hoping Square is fully conscious of this, and it seems like they are.