Not really.

The article here is saying that transmogrification is just a step towards breaking the silhouette concept, not the feature that actually breaks it.

Basically, it all boils down to one fact.

It is now a whole lot harder to tell a player's skill level before.

Example A: I can now walk around the world in my level 55 DK starter armor, and then kill the crap out any level 80's and below who try to gank me.

Example B: Before, if I saw someone in full gladiator gear in a contested zone, I probably wouldn't mess with 'em. Now, I just see a pally in Judgement gear. Little do I know that behind that outdated tier armor waits a world-champion PvPer.

Transmogrification doesn't destroy the silhouette concept. But, it's the only sign we've seen so far that Blizzard may be considering throwing the idea out.

Your entire comment doesn't address the issue I raised at all, just the issues in dealing with being able to customize your appearance. Changing my appearance from a t11 or t12 BE DK...how DOES that lead one to say "one day Blizzard will give up the unique silhouettes of each race?" All transmogrification says is "one day Blizzard will let you change the appearance of your gear."

The underlying notion to this article seems to be that gear appearance=race appearance. It most certainly isn't. A Night Elf and a Blood Elf in identical gear are still obviously a NE and a BE. It's almost as if this article started with the notion "you CAN have pandaren in both factions" and worked backwards to transmogrification.