DKII on 03 April 2007
The biggest threat to the Wii is if either the PS3 or 360 starts to dominate over the other. As long as their is no clear dominant choice for HD gaming (like the PS2 was last gen) then both will struggle to convince people (like me) to buy their system and risk it becoming obsolete. Similar to the Blu-Ray/HD-DVD battle being irrelevant compared to DVD's. Whereas right now, the Wii is different and unique so if you're interested, you get it (or try to), you don't have to worry about which of the Wii-type consoles you should get.
Essay Pro