Has anyone else tried it yet? http://www.asus.com/Gaming/ROG_Sica/
I really like the shape so far. Front is a lot like aurora(a bit less wide, slightly more \_/ shaped) while back is a mix of g100s and abyssus, fits my palm really well.
Sensor feels good, can easily do over 5m/s, etc.
The only negatives so far are rather thick cable(I've swapped mine to old razer thin one) and high button latency around 20ms(although that has never been a problem for me). The latter is most likely caused by the fact that the mouse features easy-swap switch sockets and they made a huge debouncing delay to be sure there're no problems with any microswitches. Could be fixed with a firmware update in the future, my mouse already updated once after driver installation.
Overall the mouse seems like a proper abyssus update.
Here's my comparison photogallery with other popular symmetrical mice:
http://imgur.com/a/r0srd
The mouse has been selling in Taiwan for a couple of weeks, so it should arrive everywhere worldwide soon. For anyone eager to try one now - http://global.pchome.com.tw/english/prod/DCAN8H-A90061N15, delivery takes 4-5 days.