Ashton Kutcher, the @aplusk of Twitter with almost 3 million followers, spoke today at the Brainstorm Tech conference. He said that he had some discussions with Twitter about being on the company board, but realized he wanted to stay out of it and neutral. Then later on, he said that something better will come along that will replace Twitter: this is the first micro-blogging platform, and something that improves on Twitter UI, is even more immediate (Ed: read: imprint onto brain synapses directly, maybe), has better search capabilities, syndicated better, and help makes sense of the flow better, will usurp Twitter.