Should You Consolidate All Your Technology Into One Device?

I think it's a wonderful idea. Right now I have a beater Verizon cell phone, an IPod, keys and a wallet that I carry with me everywhere. The iphone does an outstanding job of combining IPod + phone and with all of the widgets / 3g / WiFi it almost like having a pc in your pocket.

The problem I have with using an all in one device is battery life. I can use my Verizon phone for about 2 days before I need to charge it. That's with texting everyday and light/medium talk time. My IPod nano runs forever without needing a charge (thanks to good ol' flash memory) while my 60 gig hd based IPod is lucky to make it 8 hours. The iphones use flash memory, but still that single device gets used for many more tasks.

I know for a fact that Iphone users have an issue with the battery life on the phone, but being a ex windows mobile user it can't be any worse then what I used to deal with. If batteries for these devices improve, I'd love one ring to rule them all.