I don't really think that big online retailers like Amazon, Wal-Mart, iHerb, etc, are not familiar with these services. I guess their neglect of Bitcoin is primarily based on three points. First, they are too big while Bitcoin user base is, consequently, too small for them to bother about it. Second, the services you are talking about don't quite match their caliber either. They are mostly using Visa (and cronies) as well as PayPal as the payment processors for online purchases. And third (and this might be a decisive factor), there is no more or less established regulation of Bitcoin across different countries. I mean in some of them Bitcoin is effectively considered as an illegal means of payment, say, in China (though not outright prohibited), so it would give them a lot headache from the legal side of the matter

In short, Bitcoin is not yet quite on par with its bigger competitors (in respect to online businesses, at least)

It would take 5 years or more before the bitcoin will totally grow and be known by almost all people.
Little by little, day by day, more people get involved and become curious about bitcoin especially those interested in trading.
Hoping so that it would be displayed like other currency but the tendency for that is that the government might wanting to hold the bitcoin price.

The future already came true. Look at how this currency has evolve Bitcoin has already been adapt with our daily lives it is already supported in some online stores in the web.
You can use it to buy some personal necessities, use it as payment to your internet provider, pay bills, buy gadgets or buy game credits your call.
And this doesn't stop here, in the future well see some innovations in bitcoin but first it needs to solve its current problems first.

you're tired of having to convince people around you that Bitcoin and Blockchain are technologies that have come to help the human being in his odyssey on planet Earth, you should look for cities where the digital currency is most naturally seen . San Francisco, New York, and London are good examples of cities in which Bitcoin is beginning to be part of the everyday lives of many people. The Nomad List, a site that lists the best cities to live and work remotely using a series of metrics such as income, safety, air quality, and internet speed, listed cities that are more Bitcoin-friendly.

All online shops and online based companies with terms or payment of credit items via internet ...

Firstly - online shopping, lotteries, food delivery and so on. Secondly, loans and credits (if you manage to stabilize volatility).

I think  will only happen to pay for online !
In the real world, bitcoin don't as major currency, Imagine how cool it would be if you could pay on each transaction with Bitcoins,
But I believe many people will soon start receiving too

I think payment a bitcoin for online shopping is near for reality, I think it is a big help for those who are addicted in online shoppers. This would be the next target of bitcoin or maybe using bitcoin in groceries or small stores. 

Well I think in every country of the world few people there might have known about bitcoin as a cryptocurrency. But it will take a couple of years for Bitcoin to be adopted and used by up 50 percent of people the world wide and be accepted all across the markets. Right now, I know that the products that you can buy with bitcoin is a bit limited.