No, it hasn't. Still, the majority of TV viewers use TV utility providers, not ISPs. When the average couch dweller sits down, grabs a remote, and turns on Netflix instead of "channel 42" on cable TV, WebTV will be commonplace, but it won't happen until the young Netflix-watching generation completely replaces the older cable-watching generation.

He's probably referring to the 1995 set-top box company cofounded by Steve Perlman: https://en.wikipedia.org/wiki/MSN_TV#The_WebTV_set-top_box