If I understand their graph, they are generating about 0.29 BTC / day with this. Current BTC exchange is $118, so $34.22 revenue / day. At 44W, they'll spend ~1kW/day on power so only around $0.10 or so depending on where their power is coming from. So their break even point is somewhere around 8 days if I have everything correct.
It seems that if these devices can be produced at scale, the marginal cost of mining 1 BTC will be only about $0.30 for now, thereby possibly pushing down the market price for BTC significantly.