With high performance affordable asynchronous USB dacs appearing why would you need a streamer? All is needed is a laptop or a mac mini to hold the music library and feed a USB dac with the digital output you want.
Not complicated enough to sound good?
I belive streamers will stay a niche product. (maybe for the "computer challanged" people out there)...
I don't ever want to have a laptop plugged in next to my HIFI for my tunes thank you, a streamer that can be seamlessly controlled by my phone or iPad is very appealing and is what I have been using for over five years now. I know I'm not alone here, I think streamers are safe for the foreseeable future. Oh and just to add, I can send all audio from my computer to it.
Chances are both will continue to co-exist for the foreseeable future. Streamers appeal to a different set of music lovers to a computer+DAC solution. If anything, the proliferation of companies putting their digital toes in the streaming waters at this year's CES suggests streaming is not going anywhere for a while.
I don't think the availability of cheaper USB converters will hold much sway over prospective streaming customers. High performance, low cost USB converters have been around for at least five years now, and in that time streaming has significantly increased its market share year on year.