What could happen...
The issue at stake here is trademark. Not copyright, not patents. By using an image that is a registered trade mark, creates an association between where the image is used and the company that owns the trade mark.
Whilst I'm not a lawyer, the possible outcomes are:
1. Apple does not distribute iOS6 into any country which has this trademark registered / respected.
2. Apple changes the image used.
3. Apple wins at court based on that the images are significantly different.
4. Apple licenses its use, and brands its time keeping as provided by the swiss train company.
As switzerland is particularly agressive about trade marks, and passing off issues (fake designer goods do get siezed by customs in swizterland from people visiting the country, not just commercial imports), option 1 would make me nervous to take an apple product there.