For anyone curious about how the new r200 allows transfer of the dvv files for use on another system I have a hypothesis. It may or may not be wrong but it seems plausible to me so here it is:
Ok, the DVV files are indeed still stored on the HDD. Anyone can check this by looking in the USB/apps/gc_devo folder after verifying a game. If you deleted a dvv it will come back when you reverify or if you didn't delete it then it will change the "modified on" date. So my thought is this, previously the DVVs were tied to the USB device, system and the disc/ISO in order to ensure that the games were played on a 1 system setup. I believe now, and I could be wrong, that in addition to using info taken from the system, usb drive and disc/ISO that it also now using info from the WiiMote too (we know it's doing something with the WiiMote).
We know from the read me file that the verification transfer process requires connection of a WiiMote to both the old and new Wii/Wii U. But not only that, you must also use the same USB drive that you verified the disc on. So I'm assuming that upon loading Devolution on a Wii U it will ask for the game disc again due to being loaded on a new system (who's info is not stored in the dvv) but once it sees the original WiiMote used to verify it realizes the disc is verified. At this point it MAY update the dvv so you won't need to do this every time you use Devolution on your new Wii/Wii U, possibly allowing use of the games between both, the old Wii and the new Wii/Wii U system (essentially keeping a list of sorts of how many and what systems are permitted to play your GC backups) as long as the original USB drive is plugged in and the same WiiMote is synced (can't confirm this yet).
Anyway, that's just my theory. It may be wrong, maybe I even worded it badly, but it seems possible.