I agree with the Humble Pie assertion. It was a seminal live recording and the last with both Marriot and Frampton.
The Dominoes recording not so much as they did not have Duane All man at that show and he was integral to their original soun .
Although not groundbreaking, it was Clapton at the top of his game and will remain one of the best live rock albums of all time. Of course, I also think Clapton's Rainbow Concert is another phenomenal live album so I may be more than a little biased.