That article was complete nonsense. The editor estimates that both Sony and MS want both of their motion sensing peripherals to be a pillar in the middle of the selling point for they're console, and that most users will buy the 360/PS3 with their respective motion peripherals. Hes wrong. These two peripherals were clearly intended to be bought by current console owners, not new adoptees.
Price for each
Move: $50 for motion detector, $30 for navigation controller; $80 total and will probably include a game & both controllers in a $90 bundle.
Kinect: $150 (probably also has a bundle that includes a game)
For Playstation users (such as myself with new games averaging at $65-$80 a pop), the Move has quite a reasonable price tag and perfect accuracy compared to the wii. Its also boasts that it is easier to implement into games than the wii is, according to the E3 hosts.
Kinect, being more sophisticated than the move (perhaps a little before its time) comes in at costing a little under 3x more than a game from the console. This is troubling for the Kinect because no third party developers have shown any real Kinect functionality (guessing its a lot harder than a Move or Wiimote). Fable 3 might be on board but the developer has been fading in and out weather they'll have it or not. So basically all the Kinect users have to look forward to are shovelware, or minigame packs. At least the PS3 has games to back it up.
So basically, my opinion is this. Say you wanted to get something that the whole family can play, but your kid/significant other has a ps3 or 360 already. Instead of picking up a wii for $199 you can pick up a Natal or Move for less than than the Wii itself and still have enough left over for a game. They are in no way a primary selling point for either console.