There are a few digital effects in the ride from the recent upgrade. The Catepillar's smoke is now a new, digitally projected animation. And the Cheshire Cat's illuminated eyes (which precede his entire form illuminating) is now a small, digital lcd instead of dimming and illuminating plastic.
The one detail that's annoyed me for the past year is that the birthday cake now "explodes" too early. I remember in the past the light would always flash and the sound burst just as you were heading out the door, implying that the cake exploded behind you, rather than simply seeing that there is a light and the cake doesn't actually do anything.
Zoe Necrosis Chancellor, Yensid's School of Sorcery and Necromancy