Summer NAMM is not typically about synth products ... I doubt Roland would announce then ...
Really, soundwise, I don't think the new workstations really do all that much to upset the balance of power of the Big 3 ... (For instance, it's very possible the X will still have the best grand piano ... I heard the XS's new piano patch and it's a very typical Yamaha piano ... to my ears, YECCCH!)
If Roland cuts the price of the X so that it's 20-25 percent less expensive than the new workstations (and/or throw in an SRX card) that should probably be enough.
Perhaps I'll be proven wrong when I demo in person, but these new workstations seem like no revelation.
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Roland Fantom X7, Alesis Fusion 6HD, Novation X/A-Station 25, Alesis Micron