I didn't say they would, I said I'm hoping for.
Nonetheless, the lack of hardware specs disclosure during the last E3 drove to lots of criticism and investor anger (and shares plummeted accordingly).
Everyone thought (and still thinks) that "if they're not saying how powerful it is, it's because it's really weak", because that's how it happened with the Wii and 3DS.
Unless the console actually is weak (which would rain fire on the company, TBH), I think they should disclose hardware specs: GFLOPS, Triangles/s, amount of memory, clock speeds, number of CPU cores, etc.