Apple's #s should be dropping
Everyone knows that the current Macbook Air / Pro machines are due for a refresh. I'm typing this on a late 2011 machine Macbook Pro, which works fine; there's certainly no reason why I'd buy a replacement for it now when I expect a new, lighter, version within 6 months.
I *should* buy a large SSD for it, but have been holding off, thinking that perhaps the next rev of the Macbook Pro will be cool enough to make it worth upgrading.
If Apple wants its sales to improve, it'll have to ship new hardware. And not just a home use machine like the (relatively) new 12" Macbook.