TWC already offers viewing on most devices - iPads, iPhones, PCs, whatever. So this doesn't seem like a big deal to me; if anything, it means one fewer CableCard-enabled devices I need to rent (whether cards, STBs, or whatever). BW-wise, TWC is also my ISP so they are trading one DSV channel for a corresponding increase in internet traffic. That allows them to spread their DSV channels across a wider market segment, or offer more DSV channels. I don't have a problem with this.
What I DO have a potential problem with is that now the cable provider - who is also the ISP - knows what I watch, when I watch it, and even on what kind of device. This means more targeted adds, and more split-offs of high-rating content in separate packages so that I have to pay more to get the things I want to watch instead of just the crap they send everyone.