The next halving would certainly be interesting, especially if you believe the downtrend during 2014 was caused by new supply without new adopters. It's about one year and six months away from now. So 2015 might wind up being a bit boring compared to 2016 (but BTC might still go up if slowly during 2015 I hope, but i'm not confident to say we're at the bottom either), but who knows.
Last halving did make BTC go from double digits to triple digits, so the psychological effect is there I think. Then again, some altcoins have proved that halvings are not necessarily directly affecting value, but other hand the bitcoin halving would be widely celebrated in the BTC community.
you're right for this thisnk that price in 2015 will be plus minus ~30-50$ up or down, but if same thing as last halving occur then we can expect huge jump in price, for alt i dont thing that all will follow only few ones this time