It is not a luxury it is a need!!
I don't understand how people can get so thick headed. Just because they don't use it (because they can't!! they are on Verizon "The Most Reliable Network") they make these dumb claims that it is a luxury and not a need blah blah. Being able to talk and surf at the same time is a HUGE productivity tool for a LOT of serious business users. I conduct and attend conference calls on my iPhone using an application that lets people share their desktop or specific applications and make presentations. You can actually be on the conference call talking and listening while somebody is walking you through a PowerPoint document. Lets see Verizon do that. Not being able to talk and have data connectivity at the same time is not even a choice for me and millions of other serious users. It is absolutely required. This is the iPhone people!!! hello??? Not some dumb a$$ so called smartphone. You can do stuff on this device and trust me you will that you never thought possible or never did before. So just because you never did it before don't a$$-ume you won't or others don't.
The other examples people have cited here are very valid also for regular consumers. Being able to lookup something on the internet or be able to make a table reservation at a restaurant or lookup movie timings etc. I can't understand how people think this is a luxury. Wake up people!! This is 2011 and this is the iPhone not your crackberry. I am on the phone many times with my friends (sometimes on 3 way calls) going over movie timings or restaurant lists jointly deciding where to go. On Verizon you get a call, you hang up, lookup info, call back, don't have an agreement, hang up, lookup info, call back with new suggestion, that didn't fly either, hang up, lookup info, call back....... ALL on "America's Most Reliable Network" LOL!! 😀