I suspect that the reason we are not seeing this technology in practice yet, is because of how long the design cycles take. I am not familar at all with small device manufacturing, but it seems like it would take a lot of iterations to make everything fit together so tightly, and a year may not be enough time to introduce a different battery system. Especially a battery system that your engineers have no experience with.

Having said that, batteries do seem like a pretty stand-alone component of phones, so it may be possible to design a graphine based battery that replace an existing phone battery without modification to the phone. It might involve doing more work in the battery to emulate properties of the traditional battery that the phones were designed to compensate for, but it seems like there is enough room in a battery to do that.

The other problem I can see is that standard phones would likely be incapable of charging these batteries at full speed, which would only mean the batteries need a charger external to the phone.

Again, not as good compared to designing the phones with these batteries in mind, but still useful.

The main problem I can see with pursuing these batteries is that by the time you are ready to sell them, there may not be a long enough window before they become standard for it to be worth your while.

Makers of portable phone rechargers may be the compromise to those issues.

Regardless, excluding unforeseen drawbacks to this technology, I suspect we will be seeing it within 1 or 2 generations of phone.