Obviously I can't be sure either. But, of course, for most novelists the world would be pretty much the same: they'd write a terrible novel, a few copies would be bought by their family and friends, and they'd become bitter literary critics :-)

However, as you say, what about the Iain Banks' of this world? Well, I don't think much would change for them either. They'd write a novel, do a promotional tour, appearing for talks and signings, and hopefully sell lots of copies.

I think I'll let you respond here rather than anticipating your reply.