Two new growths appeared on my C. walkeriana. I think the one on the leading pseudobulb is (most likely) an inflorescence, as it is more rounder and terminates with reddish sheath-like growth; and the one coming out of the back bulb is just a new pseudobulb, as you can see there is a green leaf tip emerging from the growth (it is also quite flat). It is interesting to see the difference between these two growths.
BTW, mine is growing on a pseudo-semihydro-mount-ish thingy I have built from a rolled up plastic gutter guard lined with fiber clothes (actually, chopped up dish washing scrub pad) and chunks of pumice, which is sitting inside a reservoir filled with gravel and water. So far, it worked quite nicely and all of my walkerianas are now being grown like this.