You know the theory of the 'Bad of Deflation' - I wrote about it before... the story goes as follows: if prices fall, and consumers expect them to continue to fall, then rational consumers will withhold their demand, delaying their purchases in anticipation of lower price in the future. The result will be: reduced demand today, lower investment by the firms in future production, lower investment in innovation, stagnation, layoffs, recession... locust... fire balls falling from the skies and pestilence of the kind that only Central Bankers can save us from.
You also know my response to this, especially in the current macroeconomic conditions: falling prices support household real incomes and increase households' ability to finance debt and debt deleveraging, while sustaining at least some semblance of civilised demand.
But don't take my word for this. Here is a handy chart plotting... deflation in the price of hard drives:
Do let me know if you know of any evidence that demand for hard drives has been 'delayed' by consumers or that innovation has 'stopped' in fear of lower prices/returns by companies, or if you have seen locust swarming around...