Agreed.
I think it's difficult (. . impossible :-]) to determine where inspiration of an Artist come from. . .
By the way,like others say well,there are many others examples to think this: "PGI" and more. . . .
"UP" is a refined Album,with sounds very elegant,but i can not think this Album like "a prelude" of something in future. . . .
For me every Albums of Peter are "pearls of a moment" of Artistic expression of Peter.
Complexity is that all are completely different form each other,and Peter is Artis in constant evolution,so personally i don't see connection