They won't. The cost of producing all the components would be too expensive to be affordable for the average person. If you want to enjoy your old consoles like they were designed to be, snatch up the CRTs you find on FB marketplace or Craigslist while they are still relatively cheap. I have a primary and a backup. Both I got for free over the years.
http://i.imgur.com/R15aJJ3.png http://i.imgur.com/NJqp6LS.png