Just looked at the schedule of speakers. The vast majority of the presentations are from Intel and Samsung. China Mobile, some universities, and automotive companies are also presenting. I didn't see any representation from Arm, QCOM, nvidia, broadcom, or apple.
Samsung moved some of their product introductions up from early June. I thought they were trying to avoid Hawell product introductions that will consume lots of mindshare. I did not know about the Tizen DC.