I'd imagine that Intel should have some news at Computex, even if it's just confirmation of the product range for their 4th iteration of 14nm CPU's.
Looking at the current data available, if they are indeed keeping it on LGA 1151, then hopefully they will see sense and ensure that the H110/H170/Z170 and forward are all compatible with a BIOS update alone. Although I'd imagine that as the VRM's on these boards were only made with 4c/8t 90ish watt chips in mind, may not be able to get the best from the top tier 6 core variants, especially if they come in at the expected 115w+
The unlocked 6 core i5 CPU, would probably be the best price to performance also, since they can't price it massively above the 7600K, maybe $279. Effectively, the i7 version is going to become redundant, using the same argument that people put between the AMD R5 to R7 jump, if the R5 is is good enough with 6 core's then there's no need to spend the extra for the extra cores, and threads.
One things for sure, if the so called 15% boost Intel are claiming is the same measurement they used between Skylake and Kaby Lake, then all they will have done is bump the base clock, and the IPC will be pretty much exactly the same. And that leads to them having to address the crappy IHS fitment and thermal paste issue that Kaby has, especially with the extra power usage on the 6 cores products.
Another thought, if the 14nm++ process is not significantly more refined, then we already know that 5.2GHz is realistically the maximum performance you are going to get on normal cooling and safe volts, so it they drop in the 8700K 4c/8t with a 4.8GHz reference clock, then you aren't really getting great value for money from your 'K' addon cost.