According to this post NTT Docomo is developing a phone to deliver surround sound ring tones.
http://www.gizmodo.com/gadgets/51-surround-cellphone-as-awesome-as-it-sounds-205436.php
The trend here is not an isolated surround sound ring tone innovation. The important innovation is the integration of surround sound/high quality audio integration in the to the mobile platform natively.
Couple this with
a) Rapid improvements in battery life on phones
b) Presence of multiple wireless buses ( Wi Fi/ Bluetooth) which offer ad-hoc connectivity on cell phones
c) Increases in the storage capacity on phones
d) Soon to be launched Wireless speakers
you get the picture?
