I don't know if I buy into the whole ecosystem idea or not. I think "the ecosystem" is an interesting word because it means a million different things to a million different people.
For me, ecosystem represents the ability for products and services from a particular platform; Microsoft, Apple, Google, BlackBerry, Sony, etc. to talk and work with each other, within and outside that system. It encompasses everything the provider offers. So not just phones, or computers, or apps, or gaming consoles.
When you buy a PS3, you can't play or interact with XBox games. You are tied into that ecosystem. To use most Google services, you need a GMail account, which is another way to tie you in. Manufacturers allow outsiders into their ecosystem, but with limited capabilities.
Apple, for example will let you use an iPhone with a PC. But to fully embrace their ecosystem, and all of their peripheral accessories, like Apple TV, Air (whatever), etc. , you would be better off with a MacBook. The more you buy in to a particular ecosystem, the better it is for said manufacturer. The bigger your investment in hardware/software, the harder it is to leave.
With W8-WP8 I believe that Microsoft will now have a complete ecosystem that will attract users from multiple directions; gaming, phone, computer, business. Everything connected to everything. They allow outsiders into their ecosystem for a taste. But to enjoy that refreshing cup of Kool-Aid, you will need to buy in, in the form of multiple device/service.
So, your choices are to dabble in multiple ecosystems; iPhone, Galaxy Tab, PC, PS3, and have no integration (or commitment), or take a big gulp of the flavor of choice. Choose wisely young grasshoppers.
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