Microsoft Xbox One
Despite its impressive performance at Microsoft's Xbox Reveal event, the Xbox One will be disappointing Xbox 360 users who want to slim down their console connection. Due to its new architecture, the Xbox One won't be compatible with any Xbox 360 games.
On the plus side, rumours of that dreaded always-online internet connection have been quashed. Sort of. While gamers won't be blocked from playing games if they lose their connection, developers can still choose to create games that can't be played offline.
Another nasty rumour which floated around pre-Xbox One launch day was that the Xbox One would block used games.
While not entirely true, Wired has confirmed that using a second hand game disc will require an as-of-yet-undisclosed fee, so watch this space.