If development follows the roadmap in the OP, I dont think price will be tied to xmr, "1/10th to 1/20th" of xmr, at all. Having a slick and easy to use gui wallet, and being able to make transactions on a mobile device, will, with the built-in privacy of cryptonote, stir some interest within the crypto community at large. I mean lets face it, in real use, 95% of your transactions will be from a mobile device.
100% of all transactions will use the mobile as a second factor authorisation, leaving 0% of all transactions to be done from the very same mobile. That makes the concept behind using 2FA. My observation from own customs, storing wallets on a laptop using the mobile as a security measure.
Geez if Android wouldn't have messed up their system libraries that much, combined with strict industry customs of "no updates". Like Android 4.1 and Stagefright. You simply cannot store your wallets on such a messed up platform.
Before you can even start considering a mobile payment platform, you have to tackle a method of 2FA separated from the very same cellphone. Bluetooth connected Arduino inside a sturdy case comes to my mind. Sort of dongle. Displaying amount, begin/end of address and awaiting a yes/no reply.
Oh, and on a sidenote most pump'n'dump scams use a mobile wallet depicted somewhere on their roadmap. Most do die before delivery.