What, then, is Land's philosophy about?

In a nutshell: Deleuze and Guattari's machinic desire remorselessly stripped of all Bergsonian vitalism, and made backwards-compatible with Freud's death drive and Schopenhauer's Will. The HegelianMarxist motor of history is then transplanted into this pulsional nihilism: the idiotic autonomic Will no longer circulating on the spot, but upgraded into a drive, and guided by a quasi-teleological artificial intelligence attractor that draws terrestrial history over a series of intensive thresholds that have no eschatological point of consummation, and that reach empirical termination only contingently if and when its material substrate burns out. This is Hegelian-Marxist historical materialism inverted: Capital will not be ultimately unmasked as exploited labour power; rather, humans are the meat puppet of Capital, their identities and self-understandings are simulations that can and will be ultimately be sloughed off.