[carguychris]

What is going to happen to Walthers and the PPQ now that S&W doesn't own them anymore??

1. S&W never owned Walther. S&W has been Walther's US distributor for the past decade, and they produce the PPK/S and PPK for the US market to get around ATF import restrictions. S&W used to produce a licensed version of the P99 as the SW99, but it was dropped several years ago in favor of the M&P line.
2. AFAIK it is currently unclear exactly what company will serve as Walther's future US distributor, but somebody is bound to pick up US distribution and service for recent Walther products due to their popularity, and it's already been stated in press releases that S&W will continue producing the PPK line in the States.
3. All that said, none of this has any bearing on the OP's question because he/she lives in Switzerland, and can presumably have the pistol serviced either by Walther directly or through Walther's Swiss distributor.