I think from a business standpoint its not a great situation for Sony. Holiday season is the most important time of the year for consoles sales and MS has the better exclusive lineup and that will drive some sales for XB1.
Purely from a games standpoint it doesn't matter at all. Holiday season will be crowded with multiplats so there won't be a shortage of games to play.
Seems like a contradiction to me. If the holiday season is crowded with AAA multiplat releases, why does MS having better exclusives = more sales? The people that buy consoles for exclusives have likely done so already. From this point on, it's all about 3rd party support, price, and where your friends are. Exclusive games would rank below these and may be a deciding factor, all other things being equal.