Too far? I'm sorry but that is a fair question to ask. Kinect is a huge source of income for Microsoft. Losing the sales from Kinect would, in some way, cripple Microsofts income as a whole.
Crippling Microsoft itself? I can guarantee you that if Kinect flopped, Microsoft would go on. Their revenue is mainly from computers themselves and not gaming products. While it might be a profitable aspect of the industry, to cripple something is to render it beyond use, it certainly wouldn't cripple and collapse the company as a whole..