Well to really apppreciate Unity 3 , you'll need the Pro version with real time shadows and deffered shading, lightmapping with global illumination !
A great feature is publishing :
Unity 3 publishing You can make some low poly game or casual , and deploy it on PC/MAc or
Iphone/Android !
I target also Iphone DEV : for Iphone , Android, Shiva 3D engine can be a good alternative !