@C130 :
Yeah, you are right that the Argentines could not really hold onto the Falklands since the Argentines have no answer to the Astute SSNs and Type-45 destroyers that the UK currently possesses. Once the two aircraft carriers are in operation by the next decade, then even a full out [planned military build-up/attack effort by the Argentines to retake the Falklands will be doomed to failure.
But, if they had 24 JF-17s in the next few years, then they can take the Falklands but not hold onto them for longer than 1-2 months.