Better import on .iges, .step
Smart object snaps, construction lines

But there few important features missing if are an advanced surface modeler. I hope is gonna be the main focus for the next few releases...
Also OS X will be more than welcome. Which is the main reason for me to consider Rhino. I wish McNeel was using OS X as an experimental platform to address core problems which are the main reason why Rhino users welcoming MoI. IMO

A hidden favorite of mine (that hasn't been mentioned yet) is the chamfer/fillet edge on an entire object (without having to pick all the edges). Kinda silly it would seem, but a GREAT time saver and really nice when you need to break the edge for rendering to get rid of that "too sharp" look with little fuss.

AW