It's been far from clear what config options are going to be available, and the $3,000 price is the "starting at" price. Not sure what the options will be, but people have collectively found statements that imply all configs will have 128GB ram. Sounds good, I hope it's true.
Seems like the storage will have options, because it's "up to 4TB". Unsure if there will be differently binned CPUs (clock or number of cores). Or connectX optional or at different speeds.
Doubt it. I don't remember NVIDIA ever doing binning and having different SKUs for their Jetson Developer Kit line, which is similar to this Project Digits thing.