Well, keep in mind that lower-end cameras sell a lot more than higher-end cameras and that if you intend to get people to move up to higher-end cameras, it's a lot easier to convince them if they already have one of your cameras (brand loyalty).
I think the trend has reversed what concerns DSLRs - the movement goes from big to small these days.
High end cameras tend to be tough solid workhorses, but they lack features attractive to average consumer.
Also, due to shorter lifecycle, one might find newer technology in smaller cameras and surpassing IQ in some areas.
Pessimistic, yes, but also realistic I'd say.