Why do you want to replace them?

They look really dated to me.

Just wait another 10 years and they will be retro or vintage :-)

I asked to find out if they function for your needs.

I suppose if you wanted to get away from the spot-lighty look and go for more indirect lighting, something like this or similar would work in a steel/platinum finish.
http://www.vtforge.com/ProductsInfo.cfm?Design=124424

Always need to verify if it works with a slope.

Another choice would be to go for track lighting and use some mod-style heads, like:
http://www.littmanbros.com/plc-lighting-aspen-tr92-amber-track-head.html

or this

http://www.littmanbros.com/plc-lighting-magnolia-tr700-fr-bk-track-head.html

Of course, need to consider overall illumination in the room and how your current lights impact that vs. anything new.

I'd go with the sleek track lighting.

Pixilight?

Here is a link that might be useful: