This means also they'll change from the calatrava style case (5107, 5127 etc, used also in the 5130, 5140) to the case used in more complicated watches (5270, 5170, 5204 etc...).
However, I'd love that!
Cheers, Mark
PS: when talking about Patek, rarely rumors are reliable. It will be a surprise! ... because they know you like surprises Moritz.