I'd be very happy if the Celtics could select him, although I don't like the their chances. He didn't look anywhere close to being even reasonably healthy last season, which is understandable since he tore his ACL on 12/10/10. Even while looking slow and tentative, his high skill level and basketball IQ were evident. If he can regain the athleticism he showed in videos before tearing his ACL, he has high lottery talent.
People always say that Perry Jones can be a SF, which I disagree with because his ballhandling didn't look anywhere near good enough. But Miller is the real deal in terms of being very tall and long for the SF position and having the requisite skills.