Getting a technically complex game like LA Noire running on a tablet is an impressive feat, and one that OnLive has every right to crow about. That Rockstar took the time to implement touch controls so that LA Noire could be played natively is equally laudable. That said, the touch support isn't nearly as well-implemented as it might have been and is, in fact, downright clunky.
In short, it's LA Noire on a tablet with virtual controls, which plays out exactly how you think it does.