Re: How long?
Given the size of image captor on a phone, I assume even plain 16mm focal could be called super-tele.
Also, even if 35mm format totally disappears one day (sigh), I assume it will stay used as reference, so as to allow comparison whatever the year of models. BTW, I also assume there is no point trying to get size of captor on a phone as a reference, as this size is prone to change at high pace.