Don't panic - the Sega Saturn used a similar system where the outer ring of the disc (unreadable by a normal cd player) was used for anti-piracy checks. One fairly simple to apply modchip later, CD-Rs are running fine. The Dreamcast introduced GD-roms which could not be copied (lol). Wii modchips - ring any bells ? Solutions to these kind of issues tend to appear eventually. It's like a red rag to the hacker community (God bless 'em!)
A similar situation will develop here - XGD3 will be studied, understood and eventually bypassed.
Also, a JTAG solution for "At-the-moment-un-JTAGable-boxes" is starting to appear....... Looks interesting, if in need of a little tuning.
I don't care. I will buy Fifa12 and Battlefield3 originals as I would have done anyway. The rest of the dross I can wait for lol