He just pretty much confirmed the game, and now it won't be considered a surprised at the Sony E3 press conference by anyone in the press, and so Sony loses a point for E3.
If you confirm something before it's officially announced you reduce the impact, fact.
That is why this matters.
I guarantee you that Jaffe is angry about this. Probably very angry.
"loses a point"? See what you want to see.
Jaffe has been dropping sufficient hints about TM for everyone to anticipate TM at E3. Though he may in fact be angry; it was a childish exchange and it would also be extremely childish if anyone, say, who disrespects Jaffe, feels good about the exchange.
Best upcoming lineup shown at E3 still means that company has the best E3. Good luck in your desire that it not be Sony.