Is it Ok to announce a game that is still many years away from release?

[Tober]

With every new Console reveal, we see the same pattern in the first 6 months. Holding a carrot on a stick with games that are 'just around the corner, promise!'

Obviously to drum up excitement and get a running start selling consoles. Then inevitably (many of) those games are (much) farther away. Every console manufacturer does this.

Edit: Same can be said if a console's sale is starting to stagnate or slip. Same pattern.