I cancelled my DK1 order when I heard about the DK2 which in hindsight was a mistake but I really want the HD display. What is interesting in the graph above is they assume a exponential growth in sales. Plus I am more of a hobbyist than a full fledged developer.
Though their sales figures are not released you can interpret it fairly easily from this web page http://riftorders.aws.af.cm/
. It's been fairly linear in growth. It may have dipped a little since E3 but there is too little data to confirm that but the sales rate seems to match their current production rate. Like me I imagine that there is a fair bit of trapped demand for a DK2 type product but there is still little content until the vorpx driver ships.
I believe the product currently is for developers and the current product meets that need.
I've worked in manufacturing and product and parts pipelines are really hard to manage (especially parts). A supplier manufacturing 1500 units per week has a takt time if working two shifts with overtime of about 4 minutes. So we are not talking a large operation. The venture funding they received last week was probably largely so they could procure the HD displays and other parts they needed for their supply chain of the consumer device.
Given that the prototypes only just go produced expect a minimum of three months to turn it around to a full scale product.
Several web sites have mention the LG display which retails for under $80 as the main display but I also noticed they had only three available. HD phone displays are an in demand product, I clearly made a mistake cancelling my DK1.