forget the historical release cycles
pizzach said:
a. Have releases far appart. When a new release is comes out, your computer is surpased by an insane amount.
This isn't really an option any more - when Intel releases newer, faster chips all the other Intel vendors will use them. If Apple waits months to incorporate the current technology, their computers will look "obsolete" compared to everyone else.
pizzach said:
b. Have close releases relatively close and have the computer depreciate gradually...
manu chao said:
Powerbook cycles were roughly nine months. ... I see, a much shorter cycle thanks to the switch to Intel.
If you look at the rest of the PC industry, there tend to be "major" releases and "minor" releases - Apple will be forced into the same strategy.
"Minor" releases are a CPU speed bump, better graphics, brighter screen, more memory (RAM and/or VRAM), bigger disk.... These will happen whenever Intel or another vendor has a better or cheaper component. (For example, as soon as the 2.33 Yonah is announced it will become available in the MBP. Maybe as a second BTO option, maybe the whole line will move up a notch.) Typically in the Intel world these aren't even called new models, since it's usually just a new BTO option or a slight change to the standard config.
"Major" releases will be changes in form factor (a new sub-2 kilo notebook, mini-tower) or chip/chipset. (You can trumpet "Now 64-bit with SATA and PCI Express", you can't do the same for "Now 7.8% (133 MHz) faster".)
For an example, look at the Dell Latitude D6x0 series - D600 first with Pentium M, went through a number of speed bumps, changed to D610 with PCIexpress, couple of bumps, now D620 with Yonah dual core. Very similar form factor, same docking station and drive bay options - just a continual improvement in specs over 2 1/2 years or so.
So, minor releases will "keep up with the Joneses" and will happen much more frequently. Major releases will be the "one more things", and might not even coincide with an Intel announcement. (For example, a 1.6 Kilo notebook could be announced now, last month, or next month - it doesn't depend on an Intel release.)