Not sure why the fuss, except that this is awfully early to start talking about it. They will seriously suffer form the Osbourne effect (http://en.wikipedia.org/wiki/Osborne_effect)
Playstation 1 1995
Playstation 2 2000
Playstation 3 2006
About 5 years for each release. The PS1 sold for 11 years, and the PS2 is still selling. It seems that with 5-year console release cycle, keeping the last-gen for sale until the new gen is released, grants a 10 year cycle to each product. PS4 released in 2011 would give the PS2 a healthy 11 year cycle.
The big difference this time around, for Sony, is that by this time in the PS2/PS1 cycle the consoles were sub-200$, and they had both released with a 299$ USD price tag. The PS3 with a significantly higher price, had garnered higher expectations. Warranted or not.
The PS3 is going to be around for as long as the PS2, and PS1 were. It just won't be the behmoth the other two were. To not get a PS3 becuase of 'a PS4 around the corner' would have applied to the PS1 and PS2.