The service is already available on Xbox, Windows, Android, Amazon devices and certain smart TVs, and uses a cloud-based system to stream games directly to the subscriber's device of choice.
AntStream's library includes the likes of Art of Fighting, R-Type, Pac-Man, The Chaos Engine, Double Dragon, Pong, Metal Slug, Worms, Super Star Wars, Turrican, Bubble Bobble and many, many more – and the system has built-in leaderboards and achievements. AntStream also holds regular themed challenges based around particular titles.
AntStream requires a subscription to access, which can be paid either monthly ($3.99) or yearly ($29.99). The catch for Xbox users is that it's not currently possible to connect your Xbox-based AntStream account to a standard one – so you'll effectively need two subs. However, AntStream has said that it hopes to address this issue in the future.