Cost
A cable or satellite package with premium sport and cinema typically costs several times what an annual IPTV subscription does, and usually ties you to a contract with an installation fee.
Content
Traditional providers give you the channels of one country. IPTV gives you channels from dozens, which matters if you live abroad and want television in your own language.
Flexibility
No dish, no engineer visit, no cable through the wall. You move house, you take the subscription with you.
Where cable still wins
A satellite feed does not depend on your internet connection. If your broadband is unreliable, that is a genuine advantage — and the reason a test line matters before you switch.