The point of this is to allow one tool to do the job of two, safer and more accurately. The stanley knife can and does slip with resultant injuries. Would you have said that Concorde was someone trying to reinvent the plane? Or do you think we should still live in caves and catch our food? I know its hard to accept change, but at the very least you should try something before trying to rubbish it.
I like your idea mate. If I was doing SWA day-in-and-out I'd buy it. But the pricepoint doesn't justify it for me. Hopefully it'll appeal to some large companies who pay heed to the H&S of their workers and you get some large orders in. Good luck.
I'd have been quicker using the old method. But good luck anyway - there are many out there who just love a new gadget regardless.... TT