At the GBTA convention in August, TripActions CEO and co-founder Ariel Cohen said with a straight face that "everybody" would be using his service in five years. Cohen’s “confidence” amused panel moderator Reggie Aggarwal of Cvent. As with its eye-popping $4 billion valuation, universal disruption by TripActions is hard to fathom. This is a company whose most impressive differentiators to date are a pretty user interface and tons of marketing money. It also claims superior customer care. Still . . .