The best replacement for miracast is chromecast.

The best alternatives to miracast are rated as following:
★★★★★  chromecast
★★★★★  widi
★★★  allshare
★★★  wifi direct
★★  mhl
★★  mirror link
★★  slimport
★★  ezcast
★  airtame
★  dial
★  allshare cast
★  airplay
★  dlna
★  intel wireless display
  ipush
  screen mirroring

Your alternative for miracast is not listed? Suggest!
Speaking about miracast, one probably shouldn't forget about samsung tv.

Other search terms related to miracast and their ratings are:
★★★★★ samsung tv
You have in mind a companion for miracast and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of miracast in all years. Click on graph for more.
miracast
chromecast
widi