Would announcing games closer to launch at events like E3, be better for their sales?

[ZODIARKrebirth]

Seems at times like today they want show the big guns soon as possible. If it's the right thing it's hard to say, to know that such great games are on the way it's a great thing, but if we know that we have to wait 2 years, that's another thing. FF xv is certainly thef best example..