I sure hope you're right fox. I think the best and most cost effective solution for Sony is 3D stacking. It's possible 4 gb GDDR5 was only in the dev kits to make way of stacked ddr3/4 with high bandwidth and low latency. I believe it's also much faster to manufacture so Sony doesn't have to start production many months before like MS would have to. If they can provide full HSA and good enough hardware, then we're golden.
Next monday we should get another "leak" from vg leaks. I believe they also claimed that Sony would announce something in a few weeks. If true, then stacking seems less probable if Sony intents to release first. At the same time, a Sony rep last year claimed that the company never releases first so I honestly don't know what their strategy is.
Also this talk about a second xbox, I wonder if it's something insignificant like set top box, or xbox surface that no one will care about, or if it's a supped up console releasing later which would be awesome. Only 2 months left until we know everything so patience...