One thing I don't get about the Matrix is that you're seemingly incapable of having a wireless network between devices without those Devices being linked up to the Matrix.
I've thought about this. My "fluff" answer is that because of the mesh network nature of the Matrix, to get the kind of throughput you need radios that are on a really broad spectrum range. Basically all the stuff that right now is divided between tv, cellphone, 802.11, cb radio, fm radio, am radio, etc... has now been moved to a single standard and equipment now does something link CDMA over a huge, newly opened spectrum. Now add really cheap transceivers with really awesome power to weight ratios (after all, a transceiver is in just about everything) and it becomes simpler for manufacturers to use their standardized Matrix Transceiver Architecture to handle all the stuff you normally put on a dedicated frequency band.
BTW - These future electronics are awesome. They recharge from all the radio energy in the area, are super small, have great range, built in encryption, did I mention small?, built in firewalls, etc. Can I please have? I've got some projects in my lab that can use this stuff.