Hello MattP
Welcome to the SBB Forum.
It means that there are no direct long-distance services from Zurich Airport, as stated above.
And yes, you are affected as well. You must take the S2 train to Zurich HB and change there again to take the IC to Visp.
From/to the airport, the S2 train will not follow the regular route to Zurich HB yet take a detour. Consequently, although it is a direct service to Zurich HB, the journey takes 10 minutes more. All in all, the journey will be longer than usual. Check your connection at sbb.ch/en.
Pack your stuff in such a way that your baggage allows easy train transfers. Alternatively, you could also rent the ski equipment here.
Kind regards,
Roland