You can go wireless with your landline, but not hands-free, unless you’re on speakerphone. And this isn’t really an option people would go for if they value their privacy and want to keep their conversations private (as we all probably do.)
Ah, landlines! Do they still exist? I thought we were in the future already. Well, people might still think that they have landlines, but a lot of users are now happy with their cellphones and VOIP handsets offered by Internet and cable companies instead of Ma Bell.