Glass Panel Scan?

I have never (yet) flown in a GA airplane with a flat panel PFD/MFD.
I'll bet many in this forum have not either - but we all will very soon,
because the proliferation of such systems has far outpaced even the most
optimistic anticipations of only a short time ago. It has also outpaced the
tradition accrual of collective experience, with the gradual adoption of newer
technology. While the overall improvement in situational awareness with such
systems appears incontestable, I wonder if anyone is concerned about a risk of
degraded scan technique while staring at a single flat panel for most of our
information. Isn't there a risk of a "glassy-eyed" stare - particularly when
we're a bit tired - slowing or degrading the learned uptake and processing of
information?

G Faris