Hmm - be careful with the word "consensus" here. A bunch of people on a mailing list does not make consensus ;)

If you survey other wallets, you'll find most already switched to mBTC, that it took some effort to do so (look at the size of the patches for instance) and that probably, nobody is super-keen to change again so soon. So uBTC would make you different to most of the other wallets and services in wide usage. 

If Armory wants to do that, that's no problem, maybe it will be a competitive advantage - just saying, don't quote this thread as indicating some kind of community consensus.

Wallets and services that are using mBTC (that I know of)

MultiBit

Bitcoin Wallet (Android)

Hive

Bitcoinity

KnC Wallet (defaults to BTC but can be switched to mBTC in settings, uBTC not an option)

Mullvad

Doing a google search for [bitcoin "mBTC"] and [bitcoin "uBTC"], the former has a bunch of sites and services with prices in mBTC. The latter only has faucets, as far as I can tell, which sort of makes sense.