What benefits does Nintendo gets releasing the NX a year and a half after announcement?

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What benefits does Nintendo gets releasing the NX a year and a half after announcement?

 

1. Consumers trust - At this point it's likely that all of their big teams are already on the succesor, and it will show poor support that will affect the NX perception on launch as a product that company will not support, just like the Wii U.

2. Nintendo may be still developing big Wii U games for 2016 and 2017- In this case, it will means all those teams will release their next games very late on NX life span and history will repeat.

3. All the Nintendo consoles have a 6 year cycle - Lie. N64 and NGC was only 5 years.

4. Wii... - Wii sold 100M, Wii U only 10.

5. Normally it should be at least 5 years - At this point it's unlikely they will have anything worthy for 2017 or we fall in answer number 1 or 2. This E3 has already focused on games launching nearly and we have already the official mention of the next console from Weggie's mouth. Plus, we gain nothing if for an extra year without games.

 

History say they will announce at E3 2016 and release on holiday 2017, but, what benefits does Nintendo get announcing a new platforma year and a half before release? Wouldn't that kill the few sales of Wii U? Wouldn't that means they need to fall on answer number 2 and release big projects to maintain the little interest in the console, but at the same time will affect their next games on NX?

What do you think?