The Wii version. The guy refers to it as the "Holy Grail of Christmas presents". I believe he's thinking of the Wii itself. GH3 may be hard to find NOW, but I walked into Target at 5 PM the day it came out and I got a copy of it without waiting in any sort of line.
His "innocent little boy" has probably been smoking for years and dad's just oblivious. And yes, Target always has Guitar Hero III for like every system in stock, even the PC version.