A home phone (land line) provides *exact* location when calling 911. Cell phones do not; their location can be determined only by approximating an area within three cell phone towers. The reason to keep a landline in the home is really for emergencies. My brother has had to use 911 more than once; using the landline means that emergency services can get to his home faster, even if he can't give them his address. Also, in a catastrophe during which many more people than normal are trying to use their cell phones to reach relatives, lines can get jammed up. A landline will often work when a cell phone call can't get through due to higher than normal traffic. Remember 9/11? The same applies to natural disasters such as earthquakes, hurricanes, and floods.
My biggest beef about the landline is that it costs too much!
Edit: I should add that my information about 911 calls may be out-of-date. I researched this a few years ago for my brother and things may have changed since then. I know my iPhone can give me my exact location; however, I don't think it can give emergency services my exact location if I call from that phone.
Edit 2: Well, I should do my research before writing, not after. Here are some links with additional info:
http://www.usatoday.com/story/news/2...data/23570499/
http://www.consumerreports.org/cro/m...line/index.htm