This drape my friends is called another disposable and it is $. Every case needs one and it is a further revenue stream.
The first question that came to mind was: Why would a company that is apparently so far from completion be focused on their sterile drapes? Wouldn't you think this would be the last thing on their minds?
The second question I thought of is who is going to market their robot? If you see that they are going to the point of designing their sterile drapes, wouldn't you think they would want to know who would eventually sell their robot?