To the prediction that all content in the world would easily fit inside an iPod by 2020, Amit Agarwal asks a relevant question:
Interesting but if these Google-iPod predictions happen to come true, we would definitely need something like a Google Mini Search Appliance for our Apple iPods.
But wait a second. Are we taking of all content of the year 2020? Can we even estimate how much content that might be?
Yes, cost of storage has dropped dramatically, but many other technologies have seen similar improvements that could cause a content explosion. Network speed, for instance.
Or take cameras and video recorders in cell phones. What might be the impact of streaming high-definition video produced continually by every cell phone? And the impact of inexpensive bandwidth to store all of it online?
Yes, much of the content so produced may be pointless, but would that deter us?
We may actually never need much storage on an iPod, no matter how many functions we can think of fitting into it today. The memory required may be no more than what's needed to operate a cache for the ever connected iPod of 2020.