Five years from now we may look back at the first Apple Watch and see a very limited device embraced only by Apple-heads, nerds, and people wealthy enough to buy one just for the novelty value. The first Apple Watch is largely a notifications device — highly dependent on the iPhone and limited in communications utility.
This is no knock on Apple. There has to be a first version of any new device, and it always gets way better with time. In the case of the Watch, the “way better” may be coming next year.