do you feel the added security of the litecoin blockchain with new asics on the way will prolong the life of litecoin, or accelerate its demise?
It's hard to say. I feel like in the long run it will be a bad thing, but the effects of the centralization of Bitcoin/Litecoin mining won't be felt for some time. As corporations, old money, and old money FIAT take over mining, the affects will start to show. At that point they are no longer decentralized currencies, it is moving that way already.
I think Litecoin will remain number 2 through at least the end of the year and possibly next year too. However, things are moving so quickly that it is completely possible that its demise could happen sooner rather than later. I think Bitcoin will be much harder to topple than Litecoin.