Not quite. A very common cable sharing application is to have
2-Pair-Ethernet (10BaseT, 100BaseTX) and analog telephony running over different pairs of the same 4-pair TP cable. You use adapters[1] on both ends so you get the jacks / pinouts typical for the desired services.CATV over twisted pair would be my best guess. However, you will find it more cost-effective and versatile to just install additional coax cable for your cable TV / sattelite receiver applications instead of trying to get it running over expensive high-grade twister pairs. If you were not a consumer, there are plenty other uses for it - there is a couple of data transmission standards apart from ethernet using high-frequency carrier signals and some of them have requirements going well beyond what's specified in Cat5e.
[1] either real adapters to plug into a RJ45 jack or more sophisticated systems like the AMP CO Plus. To get a feeling for how versatile copper installations may become, you can take a look at the AMP product site: