That isn't really applicable to you though as you don't have an Atmos equipped AVR. Craig makes a valid point that you can benefit from a Dolby Atmos AVR even without the height channels, as it will put the objects into your existing surround speakers. Its MUCH better with the height channels...
A few things. Dolby introduced Advanced 96 authoring about 18-24 months ago and that is probably trickling down. Also its possible that sound designers and mixers are spending a bit more time with the mixes knowing they are going to be working with Atmos, so they are putting a lot more objects...
Now that I have a Dolby Atmos equipped HT I revisited this and all I can say is WOW, it was AMAZING. I may have watched the film in 2D, but I essentially listened to it in 3D. I added my thoughts about the Dolby Atmos mix in the audio portion of Ken's review. This is far and away the best...