Dual-mode cellular and Wi-Fi phones

Electronic News reports here that - finally - we may see a cell phone with 802.11 in it, plus the software to "operate using 802.11 technology inside the enterprise and cellular telephony elsewhere". It will operate as an "extension to the Cisco CallManager IP-based communications system" so what does that mean (this is not a rhetorical question) exactly?

Apparently it means that this new device may only work as part of a Cisco hardware package... having some curiosity and Google, I found this page of information, but about here I start to lose interest. It doesn't look like a system the general public (like me) would ever use...

Oh well, it made for a good headline.