I'm not sure how it could be read any other way. The numbers show a 60% decline in value per share for Macs. There are only two possible inferences from that:
1- either he believes there will be a 60% decline in Mac sales
2 - or, he believes that Apple will somehow give the perception that Macs are worth 60% less to stockholders.
I don't believe either, and would add the $29 back on top of the $235 to get a more realistic prediction.
Am very please to see, for once, that...