So, it's impossible to see/display the balances of offline wallets of an offline Armory installation on an offline secure PC Bitcoins storage ??
Quite "useless" to have secure wallets but not knowing how much they contain, if you open the offline Armory 6 months after (or your family if you are dead), and without access to the online PC Armory installation...
Correct me if wrong, now the BTC were sent on online Armory to the watch-only wallet generated from the offline PC wallet, I can safely delete the watch-only wallet on the online Armory PC ? Don't want people or hackers to see I own those BTC...
Yes, you can only see the balance with an online computer. If you were to somehow lose your online computer or die or whatever, there are ways to generate public keys from your offline computer, move the public keys to an online computer, and see your balance.