One of the reasons for less innovation in technology, (at least from the standpoint of IC design) is due to the fact that we due to the fact that we've reached the physical limits of what we can do with IC circuits around 2k2. --Any improvements made since then have been evolutionary, rather than revolutionary.
For example Computer CPU's have a physical speed limit of around 3GHz, We reached that speed limit in 2k2. All improvements made since then have been improvements in cache design, deeper pipelines, and adding more CPU cores on die.
A side effect of this is that the because the technology involved has become mature, less money is spent on R&D, and costs for producing CPU's has dropped significantly.
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