That isn't how his short stories have struck me. A handful that come to mind about near-future technology, not having the books in front of me, are Axiomatic, Silver Fire, The Moral Virologist, Worthless, and one whose name I forget about artificial nanomcguffins that let you gradually reprogram your own mind just by wishing the change you want. They're pretty dark, but I wouldn't classify them as horror. That is, I don't read them as saying "these are things that man should not know", but "after such knowledge, these are issues that must be faced".