The positioning of the device you need swipe looks a little inconvenient. You'd need to look down and stoop a little to touch your card to it (assuming the picture in the article is representative of normal positioning).
In the London Underground, the Oyster Card readers are placed on top of the dividers between the turnstiles, so you just move through as normal and swipe as you go.
I also wonder whether combining a credit card and subway payment card is necessarily the best idea. If you want an Oyster Card in London, you can usually grab a pre-paid one in the terminal itself, or in a newsagent by the entrance. If you lose your card, then you've only lost what you put on it.
Getting a contactless card seems more work, and I'd be a little more nervous about it being taken whilst I was waving it around.
