Both parties have to register their fingerprints using a biometric scanner that's plugged into the washing machine, which will only work if it scans a different finger than the one used before (you could also trick the machine and use two of your own fingers when you first set things up, but you'd only be fooling yourself right?).
Yes, adding a touch display would add weight to the already-substantial machine, but given that Windows 8 sports such a finger-friendly interface, the UX51Vz might feel like an incomplete version of the W8 experience.
The arcade machine will allow up to three people to take part in the sword fighting action using the exact same finger-based swipes that has made the game a hit on iPhone and iPad.