If it will use base station so HMD positional tracking will have no drift
If controllers will have no drift
If it will use better video interface with more bandwith (so we'll shut PC supersampling and HMD oversampling off, and stream native 4K) (I think pimax4K image quality is good but there is no "too much" when you talk about quality)
If it will be with less ghosting (although it's not a big thing for me)
then I'll definitely throw some money on kickstarter.
No drift - controllers - better image quality and i'm in it.