The Lakers don't need to win regular season games to prove to themselves that they are the best team in the league. They could lose tonight and I sincerely doubt it would do anything to their psyche.
The real test for them was against BOS on XMAS day. That was the only team last season that truly got into their heads and punked them. Well, they passed their test. Now it's all about staying healthy and maintaining the #1 spot in the WC for HCA in the playoffs.
Regular season games in January typically don't mean much to contenders.