I've been reading some interesting things lately about Games Workshop's forthcoming shift from metal to some sort of resin in the manufacture of their miniatures. I won't pass any judgement on this move until I read more about what the replacement material is like, but my personal sense is that metal has certain qualities that are so inherent to the format of table-top wargaming that it will be a difficult transition for many folks to make.
That is to say: if they are dedicated exclusively to GW products and games.
It is important to consider that there are many companies out there who will continue to use metal in their products. This will all be very interesting to observe as it unfolds. I believe the official announcement of what GW calls their 'Finecast' line will be around May 20th or so.