For me $4500 a share is a Camelot prediction, where all of the other companies doing research and involved simply fold and pave the way for ACTC, no new advances in tecnology and/or discoveries are made by anyone else along the way OTHER than ACTC and on and on and on.
If the author was deemed to be 100% right in his overall assessment by savvy investors, the only sure thing is that the investing world would be all over it and the stock price would already be infinitely higher than it is.
Again each to his own, but for me a baby has to just crawl and then walk before he can begin contemplating becoming a runner and breaking the world's record for the mile run-it is essentially the same here.