I think the e-ink devices are perfect for standalone book reading. Long battery life due to low power consumption, easy on the eyes. I have a Sony and a Kindle, and will keep them until they kick the bucket, and then replace them with new ones.
I don't see e-ink dying anytime soon. It's too awesome of a technology. I don't need flash and glitz. I'm function and I'll let everyone else be fashion.
That said, over the next year or so I may want to try my very first tablet. We'll see how many affordable ones crop up over the next while to choose from.
But for me it's not games vs books as well. I like both, but find reading more relaxing and often more interruptable - with 4 children living here, I've got pretty much the perfect hobby. :-)