Amid further rumormongering is the tidbit from earlier in the year that Sony definitely won't be showing new hardware at E3 2012. Ideally the rumor will be put to bed after this (kinda interesting how more info gets out around the start of April, hm?), though my guess is that instead this anonymous source will continue putting stuff out there that will get reported on the grounds that everything might be true except for the theoretical 2013 timetable.
I'd note though that the previously asserted 10-year lifespan for the system would set the window for release to approximately 3-4 years from now, admittedly a little sooner if Sony gets motivated to beat Microsoft to the punch.
To no one's surprise, I advise healthy skepticism. I remember so much bad information from when "Nintendo Revolution" rumors were around...and what I suspect is that the rumors we're hearing now are equivalent of "Wii HD" rumors that got around quite some time before Wii-U was something anybody had heard anything about. Those had grains of truth, but the reality turned out to be something very different.
I would suggest that it's not the medium, but the quality of perception and expression, that determines the significance of art. But what would a cartoonist know? -Bill Watterson