You do realize all that has just been going on over the past few weeks, don't you? Hard to see why it's relevant when discussing the drop in Nintendo's stock price over the past several years.
He's the one looking at a indicator of Nintendo's success (Their stock price, in this case). And he's shown you how it has dropped significantly over the past several years.
Clearly, the original DS and the Wii are gradually losing steam and it's clearly reflected in their financials and the value of their stock. It was the turn for the DS to be replaced this year, and I bet it's going to be the Wii's turn next year since they can't really avoid replacing it much longer.
I think this will likely be the last Christmas season where the Wii is Nintendo's flagship gaming console.