The surprise for me on the night was the AF.
No kidding you might say, it is a sports action camera, but the reality is I have never fully trusted AF for most things. I feel that it is too hit and miss and strips the photographers decisive control and intuition away, but using the 12-40 and 75mm (cupboard is a little bare at the moment), I experienced a better than 75% technical success rate, allowing me to concentrate on the action, not just technical things. Some shots happened as quickly as I could spin around and push the shutter. Very few missed entirely.
If this was to be my main photographic focus, a 17mm or 25 f1.2 (for cleaner, low angle back grounds) and 40-150 Pro zoom (more versatile for down the court runs) would be in the bag and maybe the EM1x, but for occasional stuff this works fine.
The area I think Olympus really needs to offer something is in the super fast medium tele area (200 f1.8 or f2). This would make the most of the the other set of advantages the M43 sensor has to offer*, but until then they are fighting a head to head sensor race with full frame cameras that do offer theses lenses, even with their inherent disadvantages (bigger size, higher price, and a 50% reduction in reach).
*More depth of field at the same magnification, allowing the use of faster glass without razor thin focus and/or the 2x reach at the same focal length (200=400 on a FF) it offers. The reality is, it is much easier to make a 200 f2 than a nearly impossible 400mm f2! My 75mm f1.8 that did really well on the night is a full frame 150mm f1.8 equivalent, or in other words the mid point between Canon’s slightly slower, bigger, more expensive 135 f2 and insanely big and expensive 200 f2 IS lenses. All this power in a lens that fits in a coat pocket. Olympus (or Panasonic) needs to go one better and soon, before the Olympics. To add more emphasis to this argument, they already have a history of making these lenses for the recently replaced 43rds range (a 35-100 f2 and 150 f1.8)!
If not why make the EM1x?