From the point of view that criticism of your own enemy is often far easier to swallow than criticism of yourself, it isn't quite so surprising that 1984 is the more popular and better-known work.
Both are tremendously prescient.
As noted elsewhere in comments, Neil Postman, particularly Amusing Ourselves to Death, continues Huxley's critique. Postman himself is very strongly influenced by (and studied under) Marshall McLuhan. You'll also find this theme in Jason Benlevi's Too Much Magic, and other more recent works.