What immediate implication did the verified survival of the sheep, duck, and cockerel have on the future of ballooning?

Answer

It transformed the hot-air balloon into a viable vehicle for human transport.

The safe return of the three animals provided the necessary empirical evidence to elevate the hot-air balloon from an interesting scientific demonstration to a legitimate form of transportation. Since the proxy for a human (the sheep) and the flying creatures both survived the transit through the unknown upper atmosphere without permanent harm attributed to altitude, the Montgolfiers gained the confidence and justification needed to proceed to the next, significantly more daring phase: the first untethered manned ascent, which occurred just a few months later.

What immediate implication did the verified survival of the sheep, duck, and cockerel have on the future of ballooning?
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