Oh yeah, and the Tokyoflash concept watch also tells time, but it does so in an abacus-like fashion. Each block corresponds to minutes and hours.
Implications - You count the blocks on the watch to reveal the time. An example that the Tokyoflash concept gives is, "12 blocks for hours, 5 blocks for groups of 10 minutes and single minutes 1-9." The seemingly complex watch is great for those who are social-media savvy and need to keep up with the world of Twitter.