I'll sorta talk about all aspects of what's been 
posted so far ^^'!

To answer Cel_newbie's question first:

Unfortunately for us companies are slowly marking 
off cels in the production process, & converting 
to all CG.  The only actualy production material 
we'll be able to buy is the original drawings, 
gengas for the sequences.  Some people might get 
they're hands on actual storyboards, but most of 
them are copied like what's being sold today.

The process of converting to CG seemed to be 
going pretty slowly from the start.  Now, most 
new anime is all CG, but there is still some 
using cels in there, be it for the whole series, 
or just bits & pieces.  All the new anime I've 
been watching has been CG, & I have yet to see 
any cels on the market for them.  

Cels are going to rise in value(which they 
already have over the past several years), 
because all the HIGH QUALITY cels are going to be 
coming from private collections.  We see the 
process already in full effect.  Cels are going 
to eventually run out, most collectors will drop 
the hobby, & the hard-core collectors will be 
shelling out the big bucks to get their hands on 
some original production material.

Now, to answer on the other questions regarding 
the artistic differences ^^':

Wether it be CG, or original hand-painted 
cels...It's still art & being produced by human 
beings in the end.  I do however feel that cels 
hold more of a value, since it was all hand-done 
without the use of computers(which makes the 
process easier).  There's no mixing of paints a 
thosand times over by hand making sure you have 
the right tone, when you can just pull up your 
saved palette that's on file, there's no 
correction layers from human errors, etc...

It's like going to a fine art dealer & looking at 
an Original Monet.  Then the dealer tells you 
over here is the high quality print made by a 
computer.  You have enough to buy either one, but 
which would you choose? 

Original artwork not produced by a computer is 
always going to be worth more, & more treasured 
than that produced on a computer.  It's hard to 
put into words to explain this fact.  I can agree 
with summerfox on her arguement that CG is still 
as valued as hand-painted cels when it comes down 
to the effort put in by humans & the fact that it 
still is art, but I can agree with the other 
sides that cels will always be better than CG.  I 
guess you can just say "It has a human touch to 
it."  No aid by the wonders of a computer, just 
the blood, soul, & sweat mixed into the paint on 
the canvas, wall, or cel.

I myself have been an artist for my whole life
(Was thrown into the Kansas Art Institute at the 
age of 6 O_o!), & it's hard for me to produce my 
art on a computer.  It just doesn't feel "right" 
to me.  Granted it does make things easier 
especially when I'm trying to color in an 
illustrated sequence, but the "magic" for me just 
isn't there.  Placing a hand-stretched canvas in 
front of me, laying out my hand mixed paints, 
smelling the musky smell of the oils, getting 
splatters of paint on my in the process...the 
clean-up...Ruined clothes...The dancing of my 
hand across the canvas...It just isn't the same 
as sitting in a chair for 8+ hours a day, 
clicking a mouse, & filling in color onto a pre-
loaded image, saving your file, & then going home 
clean at the end of the day...Not the same at 
all.  

Anyway...Does anybody else see themselves in the 
future...Watching an all CG show...staring at the 
screen, & a BEAUTIFUL pan shot goes by the 
screen, & you say to yourself..."Boy, that would 
be NICE cel to have...Too bad I'll never get that 
cel now because of the CG...Maybe I could get the 
drawing if I'm lucky..."...

That's my thoughts anyway^^!

~Ms. Poe