Good question, so I've written Roland for an answer. I did notice the following:
"Some players like levers or wheels, while others prefer external pedals. With FANTOM-0, you can use any of them—or all of them. And there’s even a dedicated USB device port to extend your workflow with your favorite USB MIDI controller."
MIDI 2.0 already has a definition for sending 2.0 data packets over USB, so perhaps this is intended to allow future compatibility with various MIDI 2.0 functionality. My guess (in the immortal words of Herman Cain, "I don't have facts to back this up") is that it has the hooks needed for MIDI 2.0, but they're not promoting it because there's still nothing to hook into that's available to the public.
“Hopefully there’ll be an operating system upgrade sometime in the future to implement MIDI 2, even if it’s just to respond to the CI with “this device is MIDI 1.0 compliant”!
One reason there's little to nothing is that the standards are not yet complete.
For one, the MIDI file standard hasn't yet been published.
How can a DAW creator create a sequencing program when they don't know what the standard will be for data storage?
There's still, as far as I'm aware, only the USB standard published for interconnect.
That's pretty limiting if you're setting up a studio with a MIDI patch panel or attempting to connect several devices on stage.
Will I have to update all my software to take adavantage of it, e.g. Finale, CbB, all my orchestral VST's, etc.
How much is that going to cost?
It won't ever be compatible with my PX560, nor my EWI4000s, nor my AN1x, nor my VL70m, .etc. etc.
I couldn't afford to replace them even if they were remade MIDI 2 compliant.
So for me it's completely irrelevant.
MIDI 1 does me just fine.