Will the whole game of chess be just memorized due to the help of computers? Will GM's and even lesser players prepare up to move 40 or 50? If so, how soon will this happen?
Never.
Not many people have the ability to memorize the number of lines at depth that are good enough for draws/equality.

Will the whole game of chess be just memorized due to the help of computers? Will GM's and even lesser players prepare up to move 40 or 50? If so, how soon will this happen?