I'd like to see Ian Holm come back to play Bilbo in the Hobbit also. I don't think he looks too old for the part. However, I did read that he said he would not come back to play Bilbo, because he felt he was getting too old. He did want to go through the strenuous rigors of making a film like the Hobbit. As for Christoper Lee, he may be older, but his part in LOTR was small, and would also be small in the Hobbit, if they even put him at all. Plus, people age differently. Some people are healthier at 81 than other people are at 60.