Hi,
yes, it means exactly that! You will keep the Internet and TV but won't have any landline number anymore.
Moreover it might be important to say the following:
with any Vivo package, i.e. VoIP (telephony over internet), it is technically not possible to use any CPEs such as TalkTalk or others.
That means Vivo S = No TalkTalk. But: with Vivo You have a complete flatrate within Switzerland; i.e.: all calls within Switzerland are completely for free (except 090x and 084x numbers).
Grz,
Der_Epistemologe