I have a gaming pc, I have a ps4 and a WiiU. I was planning on picking up an XBO at some point but that plan is no more. This will have an affect on sales and turn off potential customers but likely only about 0.5% of those will be in a simlair situation and come to a similair conclusion as me.
It's hardly a dent in the Xbox brand and sales and it won't be until PC gaming becomes more mainstream.