I sometimes wonder about it (mine are 9 and 7) but overall think I'd miss it. They both still enjoy it and I generally do too. I also find they are more likely to talk to me about other things when I'm reading to them which it would be a pity to miss out on I think.
Would it suit to read to them at an earlier time? So not quite 'bed time' story.
I still read to ds age 8 and we both really enjoy it. However, I've always liked reading stories and can sympathise if you don't, as there are other things I don't enjoy doing as a parent. How long do you read for? Maybe just cut it down?