After seeing the Galaxy S6 edge, I don't see any other company this year topping Samsung with that announcement. It makes the 2016 S7 edge even more anticipating if they bring back the features that were sacrificed this year. We learn more from our mistakes and failures. We will get a LG G4, Sony Xperia Z4, Apple iPhone 6s/6s+, new Moto X, and Nexus. Most will likely be just evolutionary upgrades like what the normal S6 and One M9 are. Not too different or unique from last year.
But how can you top the design and unique factor of the S6 edge? It seems like the prototype and sneak peek on what FUTURE phones might look like for the next 3-5 years! I can't think of any other phone except another Samsung flagship like the Note 5 edge (or Note Edge 2). But since the dual-edged display was announced on the S6 edge first, it still maintains its freshness edge. Plus, the S6 edge could be cheaper by then by the time the more expensive Notes are released.
LG, Sony, Motorola, and a few others better bring their "A" game because Samsung hit the ball out of the park recently. The rest have to now play catchup and THINK DIFFERENT to wow me.