I'm guessing we see the new ROKU 4k within the next month. I've gotten emails from ROKU about the price for the ROKU 3 being $79.99 and now many websites have similar prices. March is when the 2 and 3 were released, I'm pretty sure. All signs point to an announcement soon.
I don't know about you, but I would be pretty pissed if I buy a Roku 3 at a discounted promotional price and then weeks later Roku announces/sells a new better unit. Now, it is possible that Roku is discounting its Roku 3 model since it is now "dated" and also to be competitive with Apple TV. Current ATV3 is being sold now for $69 as a way to push sales with the new HBO Now 3 month exclusive partnership deal.
A new Roku could very well be on its way. A new $35 Raspberry Pi is now available with a Quad-core CPU so a new Roku with better hardware for the same ~$100 price point seems to be plausible in the very near future. I personally would like to see an Android-based Roku 4 with Quad-core CPU so Roku can do what AndroidTV and FireTV can do plus everything Roku 3's do now.
2xRoku2 XS,Roku1+SE,Logitech Revue GoogleTV,Raspberry Pi+XBMC,Mac Mini+EyeTV DVR+RabbitTV+PLEX+Kodi,TiVo Premiere,Sony BluRay+streaming apps,Equiso Android TV,FireTV,Nexus player,Simple.TV Local TV:QAM from ISP coax line. PLEX+unsupported apps