Looks like the iWatch is coming in October. I don't see a place for it in my lexicon of Apple products, but many joggers and sports people think otherwise.
With a company as big as Apple it needs to be a big enough product to make it worth them doing the work not only to bring it to market, but to make it the best in the field - by far. Presently the iWatch market is only 2 million world wide. Not enough of a market for Apple. However, the tablet market was tiny until they chenged it forever with the iPad so maybe, just maybe we are about to see another hitherto small niche become a huge market. Who knows?
With Apple pulling the strings anything is possible.