Faster Computers and Better Algorithms Will Fully Decentralize Blockchains
Briefly

Ethereum smart contracts today typically hover around 24-25kb, but a future with megabyte-sized contracts, featuring embedded machine-learning models, is highly possible.
The notion of limiting smart contracts to 25kb will become as outdated as the 640kb memory barrier of early PCs, once technological advancements take hold.
Blockchains require significant computational power, which may seem wasteful, but ensures security through repetitive verification and consensus, given the current lack of trustworthy authorities.
Historically, computing resources were scarce, limiting progress; however, the growth of computing capabilities has shifted paradigms, allowing for sophisticated applications in blockchain technology.
Read at Coindesk
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