If you consider the $2000-$5000 budget, computer audio would be a good way to go, but for me and my under-$1000 budget for a head unit, I have to go with a used high-end CDP. I have about 500 CDs in my meager collection, which is growing every week. I would have to buy a laptop and a DAC with the associated cables to get started, even then there is no remote, unless I go with a mac mini, in which case I have to buy an iPod touch. More money. And if you also consider the time investment required to get through all of the potential driver issues, its just not worth it for me.
As for the demise of the CD - if CDs disappeared, I would not be able to grow my collection of old-school Bowie. The advantages if computer-based and hi-res playback are clear, but so little music is available in hi-res, or even lossless format.
I don't think CDs are on the way out anytime soon. The recording industry's entire infrastructure would have to change. The record labels aren't that nimble. Don't take the demise of the brick-and-mortar music store to mean CDs are obsolete, CD sales have just moved to a different venue. I can pretty much find anything I want in 16 bit, 44.1 redbook CD on Amazon. I cannot get everything I want in lossless format online. Not even close. mpeg3, or mpeg4, sure, but who wants that. Ick.