It's worth keeping in mind that the Internet originated in 1969, under the name of ARPANET under a contract led by the renamed Advanced Research Projects Agency (ARPA) granted by the US government, connecting the computers of 4 universities (UCLA, Stanford, UCSB, University of Utah). So technically, the backbone of what was to emerge during the 2000s was already laid out as early as 1969.I think in 2000 "internet" and 2006 "smartphones" would have been part of the answer.
As far as smartphones were concerned, the very first device created by Research In Motion (RIM), the company that ultimately created the Blackberry (and the company renaming itself Blackberry), was the Inter@ctive Pager 900, a two-way paging system, back in 1996, and which could conceivably be considered the early predecessor to the smartphone. Now looking back when these products emerged, could we have foreseen how big smartphones would have become? Only in hindsight.