The number of cars connected to the Internet worldwide will grow more than sixfold to 152 million in 2020 from 23 million now, according to researcher IHS Automotive.
GM, Volkswagen AG's Audi luxury line and Tesla each revealed latest plans this week to offer Web connections in their cars, including Wi-Fi hot spots for tablets and laptops.
"People spend a lot of time in their car, so connecting their car to their life and making it seamless has got a lot of upside," Alan Batey, head of GM's Chevrolet brand, said in an interview. "It connects with people who previously, perhaps, hadn't thought of Chevrolet as the brand for them."
Racing to see which automaker can behave most like a tech company, Detroit executives have taken to bragging about apps and bandwidth, in addition to torque and towing ability.
"The car is becoming just another device in the Internet of things," Raj Nair, Ford's group vice-president of product development, said in an interview. "Increasingly, you must be a technology company to be in a leadership position in the auto industry."