Cell phones have always given us the ability to talk. Therefore, they are their own contact medium. E-mail has also revolutionized the way we talk. Mixing the two together gives us a whole new way of staying in contact. Most of us don't need to stay in contact that badly.
Wireless internet is a toy, just as most cell phones are in general.
Unfortunately, cell phones themselves have some realistic value in terms of communication and safety. Wireless internet doesn't. Image calling 911 on your cell phone to report a car crash. I see very few people actually attempting this, and it's a hilarious site to watch when someone attempts to use their cell phone for these purposes. Until they can iron out many of the wrinkles and costs involved with wireless internet, it will remain in most of our minds a toy.