The organisers of the Science Museum's Game On exhibition have announced that they're taking delivery of Wii and PS3 consoles. The two new machines will be installed alongside Xbox 360 on Wednesday, thereby creating an interative next-gen showdown area. No word yet on what games they'll be running, but a Gears of Wars vs Resistance vs Red Steel face-off would be interesting. And if you get bored in the inevitable queue, you could always scamper off to try one of the 120 other machines at the event.