it will be more powerful then the PS3 obviously, there will at least be a gap like the ps2 to the wii. That was a 5 year gen for Nintendo, this one will be longer. Nintendo is probably gonna look into a $300 launch price, even at $250 they can make a system more powerful then PS3 for a profit in 2012. The PS3 isn't some kind of god guys, technology gets cheaper quite quickly, and after 6-7 years no matter how advanced it once was it will be outdated.
currently playing: Skyward Sword, Mario Sunshine, Xenoblade Chronicles X