I'll be upgrading the phone shortly ;). All things change, the business world might just allow for these watches in time. A worry would be having the watch visible and then having it very colourfully announce notifications in full view.
In honesty, it's probably one of those things you can't immediately see the full usefulness of. I remember getting the original iPhone thinking it was cool and without a clue as to how gamechanging it would be. It's hard to remember, but many phones at that time had incredibly primitive Java based operating systems with the processing power of a calculator, and the occasional application download was paid for with text messages ;). Look where we've ended up with smartphones being almost indispensable... For me, it's reduced my three previous common carry items to just one - from phone, book and portable disc player :).