From the conclusion of his Guardian piece:
The reputation and reception of Iain Banks as a mainstream author may fluctuate in the future. His verve and talent will always be recognised, and his work will always find and enthrall new readers, but tastes change unpredictably as decades pass. But the place of Iain M Banks in science fiction is already assured, and permanent. He was one of our very best, a star whose light will travel a long way, and fall on places not yet built.