I am not sure how you could tell the time using the hour glass display
It would probably go the same way as the binary watch that I had which took me 3 months of use before I got the hang of telling the time (without spending 10 minutes counting on my fingers and toes) by which time the novelty had worn off and I stopped wearing it
Any more new cool watches?
The 'pong' watch prototype which was highlighted on a previous thread springs to mind, that one looks superb and captures the whole retro theme brilliantly IMO.