I heard this from a attender of the trade show in Korea.
He said NX10 was displayed with Canon 500D and Panasonic G1 (GH1??) side by side.
There was a comparison chart, but most part of the chart is hidden under papers.
He got impressed NX10 becomes fatter than the mock-up shown in PMA 09, but it is still very small - actually he felt it is the smallest one among 3 bodies.
It has best rear-display and shortest response time for user actions.
He mentioned NX10 seems to have almost equivalent AF speed to what dSLR has.
He saw 3 lenses for NX10 include a prime lens. The prime lens is very thin, and it will have faster speed than Olympus 17mm pancake lens.
Also he mentioned about the price, he understands that Samsung will set aggressively NX10 price. Since Samsung designed/developed most parts of NX10 by alone, Samsung has more room to control the price. It will be definitely less than its competitors. Even it could be unexpected price.
Samsung is very serious about new NX series now.