The company hasn't decided how much it would charge for the box, although it's implied that you'd pay a monthly rate like you would for a modem or cable box. The sources said the hardware would be available sometime in 2019.

There's a big gamble involved. When your TV, game console and other dedicated devices already have access to many of these services (including Comcast's own), why would you pay for a Comcast device that does the same things but won't let you install the apps you like? If this device does ship as planned, though, it would represent Comcast further acknowledging the changing nature of its business. It's still bleeding conventional TV customers even as it adds broadband subscribers. This would give it a device to sell or rent to those internet-only viewers and soften the blow of people abandoning traditional TV service.