My point is: the "pro" suffix will not make .pro extension more popular that's what i think.
I don't agree with you on this point, the Pro suffix branding angle is significant and could increase the popularity of .pro if more people were eligible to register. I have a question for you, why do 15,440 people or businesses in the US choose to register a trademark with Pro in? They pick a word, maybe the generic product they sell, and add Pro either before or after it. Why not add words like Org, Biz, Mobi, and Info?
People add Pro to make a business name sound credible, to add impact, to make it more memorable, to project a professional image, to establish themselves as an expert or authority on a subject and so on. A domain name, especially one in an alternative extension that gets little natural traffic, is just a name. If people choose to add Pro to an business name offline because they think it has a ring to it, they may add it to an online name. They could do that in a KeywordPro.com format, there are 800,000 Google indexed pages where the site names ends KeywordPro.com, or they could choose to remove the .com and put a dot between Keyword and Pro. By removing the .com you lose the .com mindset saturation but you get a shorter, snappier brand, one that uses both the keyword and extension.
I don't understand how you can acknowledge that 15,440 businesses choose KeywordPro as a business name and register it as a trademark but assume they won't like Keyword.pro as a domain name. The branding motivation behind KeywordPro and Keyword.pro are very similar.
I don't mean this disrespectfully, I hold anybody who speaks more than one language in very high regard, but you did say you had poor English, do you think that because English isn't your first language you may not pick up on all the aspects of Pro useage? For example, you asked what does Game.pro mean and if I wanted to create a professional game brand? You view Pro in terms of professions and careers. This is one possible use, I have several .pros that tap into this like Training.pro, Staff.pro, Company.pro, Hire.pro, and Recruitment.pro. However, there are alot of other angles with Pro. There is the gaming angle illustrated by the 38 games on Game.pro that use Pro branding, there is a huge number of software and gadget companies that use Pro branding; you picked up on two, Microsoft and HTC. Then you have a sporting angle, again it's massive, I went to a sports shop today to buy some golf balls and maybe 25% of the golfball brands included the word Pro.
Pro can work with virtually any keyword. For example, I had an expression of interest in Quote.pro about 1 year ago. I traced the email to an insurance software company called QuotePro. I registered Train.pro in December 2007, 9 months later I had an email from a French guy with an anonymous Yahoo.fr email address who wanted to buy it. About 3-4 days before that the French National Railway company SNCF registered Trains.pro. SNCF employ 180,000 people and operates 14,000 trains daily. SNCF registering Trains.pro goes beyond a defensive registration, it demonstrates the potential branding appeal of .pro to big business. At the moment few people have heard of it, only about 10% registrars sell it, and most people aren't eligible to register it. If that situation changes, .pro could outperform alot of other alternative extensions. Even now, .pro is growing at about 3%-4% per month and registrations have risen sixfold in the last 15 months.