I see your point about vaporware, but I think that term generally refers to software that will likely never ship. I don't think Google will fail to ship 4.0.
Right now, the source exists, and I can't get it. I think it's pretty straightforward to call that closed source.
> I think it's pretty straightforward to call that closed source
Straightforward and pedantic. Even the GPL allows a "reasonable" time for someone to yield the source upon request which as been widely interpreted as up to a month. If the source will be available in a reasonable time period then it's reasonable to call the general project itself an open source one.
Right now, the source exists, and I can't get it. I think it's pretty straightforward to call that closed source.