The AbioCor heart is not like the Jarvik 7 which kept Dr. Barney Clark alive for 112 days after his natural heart was surgically removed. Clark's problem was that the Jarvik 7 was an external machine, and the pumps and hoses leading into his chest left him open for infection and strokes. The AbioCor represents a step forward in that it is fully implantable and therefore reduces the chance of infection.
Furthermore, doctors working with AbioMed are stressing that this is not a miracle technology. There's still the risk of infection and stroke, even if it is reduced.
"We'd like the public to have rational expectations," said Dr. Mehmet Oz. "Don't treat a failure of the device as a failure of the technology. We never flew across the world in our first endeavor."
AbioMed's webpage states their focus is to produced technology "designed to complement and/or simulate the heart's natural pumping action." In other words, when they don't have to replace the heart, they won't; they'll just try to supplement it as with the pacemaker.
Maybe we're not too far away from receiving bionic implants?