In fairness to Canon, I don't think that's what the article implies,
nor do the quotes within it from a "Canon Tech' (hardly an official
source, as well).
I think what the Canon Tech is stating is that for the time being the
64 bit OS is being adopted principally by high end professional users,
and as such, they will be first conversing the drivers for machines
they make that are targeted to that professional market, while they
are taking a wait and see attitude regarding printers and peripherals
which are less likely to be used by people in the high end
professional market, who use a 64 bit operating system.