However, the G8 leaders firmly rejected the idea that their group might one day get replaced by the G20.
In response to a relevant question at Saturday's closing press conference, the Canadian prime minister said that although the G20 has done a magnificent job in dealing with the financial crisis, it also has limits, and that the G8 will remain "equally vital" as the G20 and other key international bodies and forums.
"It is central that the G8 keeps its promises going forward. This is essential to the credibility and effectiveness of this forum as an organization," he said. "The G8 has been reshaped and re-energized."
The Muskoka Declaration also stressed that the G8 has " demonstrated the capacity to design credible approaches to meet the challenges of our times."
"For over thirty years, it (the G8) has shown that its collective will can be a powerful catalyst for sustainable change and progress," the document stated. "We, the G8, are determined to exercise leadership and meet our obligations."
It was also confirmed in the summit document that France, which will take over the rotating G8 presidency from Canada next year, will host the next G8 summit in 2011.
"Leaders welcomed the offer of France to host the next Summit in France in 2011," said the Declaration, without specifying when and where exactly the next summit will be, or whether it will once again go side by side with its G20 counterpart.