I totally disagree. Innovation does not happen on a fixed schedule; you have to wait until the technology is available to match a significant product vision.
Look at how long it took Apple to do a tablet. The iPad launched more than a decade after Microsoft pushed their tablet vision; heck you could buy iBook tablet conversions for years before the iPad.
Samsung rushed their watch out the door to beat Apple to the market. Result: total dud. I'm not eager for Apple to try te same thing. Tim Cook will achieve the best success by pushing his folks to NOT launch until they have a blow-your-mind level product.