"Combine Bitcoins block chain technology" is not ( our ) Bitcoin Blockchain. i read that they will use "their own" somehow...
You're correct but I don't think it was ever meant to be taken as Bitcoin's blockchain. All they're saying is the blockchain concept offers a lot of promise, and that in and of itself is a meaningful step.
IBM won't be the only company that will be interested in the blockchain tech, though how many computers are needed to at a minimum to make it run smoothly and efficiently?