In my view, after his humiliation by Apple's board, Carl Icahn feels his power (and by proxy the power of wall street) slowly and surely being stripped away by tech. This is at the root of his obsession with pmarca, who famously claimed that "software is eating the world." The world that's being eaten is the world of Icahn and wall street financiers like him. The tech industry has its own source of finance (namely an…
Not saying I like it, just saying it's reality.
Also, Carl Icahn introduces the idea corporate democracy which is a good thing considering how much influence corporations have over our lives. The idea that at least one person can affect the outcomes of a large company like ebay perhaps shows other large firms they have the same potential.
I imagine a future where there are kickstarter-like shell entities which acquire large shares of important corporations and where backers can all vote where Exxon chooses to drill next or which companies Google should be acquiring(obviously GOOG is a bad example because they've been doing so well but hopefully you get the idea).
I know this is the basic idea behind holding shares, but perhaps the voting power can be more evenly distributing in these shell entities. In the current structure one share doesn't get you much voting power in a corporation.