You're right. I really do like watercraft, but I also know that LEGO would never put their existing electronics at risk by developing a product that would simply break itself. That would be wasting money creating the motors and hubs that would need to be included in the set, only to get them destroyed when tested in water. (Has anyone ever dared to test their Control+ elements in water? I didn't think so.) They would have to create an entirely new waterproof motor system, and knowing them, they would not just give us that gift on a silver platter for less than $200, at least. So an aircraft set that does not require water to work is far more likely and reasonable at the moment.
Totally agree with you. That would be ideal, but at the same time it might not be practical unless LEGO develops a new high-speed motor that can make the model fly, since it is Control+. But who knows? We'll see.
Oh, on second thought, the big aircraft I want can wait until the second wave, if what you are saying is correct. That would give the designers more time to develop the model, which allows it to be bigger and have more functions. Take the 42131 for example. They've been working on that model all year, and look how awesome the final product is. The bigger the aircraft is, the better it'll be.