Is This a Realistic Expectation For A Chin Implant?

The chin augmentation results you simulated appear reasonable and attainable. This degree of increased projection could be done with a chin implant or sliding genioplasty. Niether approach addresses tooth allignment issues, though.

I think based on your photo and not your examination this is very doable.  I think the chin augmentation with a #2 or 3 depending upon how it looks at surgery will give you a reasonably close result to what you have pictured here.  As far as the nose, this is a truly 3-D structure and changing one part may affect how everything else looks.  I would see a board certified plastic surgeon or facial plastic surgeon with expertise in rhinoplasty and discuss your procedure and desires with him or her.  Good luck, Dr. Schuster in Boca Raton.

I think that's an achievable result.  Dr. Lee is correct, however, if you have a severe overbite you may want to get one more opinion from an oral surgeon or a facial plastic surgeon who does genioplasty by cutting bone, regularly.  But I can say with good confidence that the above photo is very achievable. 

Best of luck

Chase Lay, MD