Like I said .us is a different situation to other ccTLD's.
Like .com is synonymous with the U.S. the ccTLD is synonymous with that locality. The established ccTLD's have recognition, type-in traffic, SEO benefits, etc etc. None of that applies to .us
Sure there will always be small businesses confined to the U.S. market but what benefit is there in choosing .us over .com to target the U.S. ?
Their egos aren't going to say "I'm a proud American I only want .us" it's just not going to happen unless there is something of value to be gained from migrating to this extension.
All kinds of companies limit their exposure with .de, co.uk., etc.- and to much smaller markets than the USA. Sure global brands would want the .com, but what about the vast majority of businesses that will never be global brands? What if I need tax assistance, and the .com company is a Canadian or British tax accountant? What of I need a builder, and the .com I visit is based in Australia? Most small business in the world are confined to one country, and that's why cctlds have done so well.
The Canadian tax accountant would likely have a .ca and the Aussie builder would have a .com.au
I think it would require big US brands to actively use .us for the extension to gain any momentum and for others to follow suit.
But i think i'd prefer my chances of winning the lottery than that actually happening.
I think your basically saying the more .com gets diluted with global websites the more appealing .us will become? I don't really get that logic. For the most part, if you want to get in touch with a local business you will find them on a .com and with internet shopping, customers have become accustomed to dealing with overseas companies for years now. This is not alienating the .com extension and I doubt it's frustrating U.S. consumers.