Foreign countries with single payer schemes are all experiencing burdensome, if not unsustainable, health care cost increases. If their programs can't contain it, Obamacare can't either. (Particularly since Obamacare seems aimed primarily at HI, not HC costs themselves.)
Generally costs decrease as supply outpaces demand. Obamacare can be expected to do the opposite - increase demand but not supply (if proponents are correct). Aside from inflation, rationing seems most likely. If wait times for care etc increases, will you blame Obamacare?
Edit: Deflation in costs seems far more likely from other factors such as depressed economic conditions.
Fern