Thomas Szlezak writes, "With the Wii U already in stores, Microsoft and Sony are next in-line to make their next-generation debut with their latest console entries expected to launch later this year or early next. Speculation meanwhile – with the help of leaks and rumors – has been running rampant about what exactly is under the hood of each company's console, and what features we can expect. One of the more important pieces I’m eager to hear about is the backwards compatibility these long-awaited consoles will offer. Given each console's long life cycle and the large physical and digital libraries consumers have amassed since launch, backwards compatibility is likely to be a big factor in terms of early adoption rates."
They're not even in the same league, even without knowing the full official spec.
Keep your PS3 and the B/C questions are redundant...