The best replacement for 720 is 1080p.

The best alternatives to 720 are rated as following:
★★★★★  1080p
★★★  1080
★★  1080 tv
★★  1080i
★★  1080 resolution
★★  ps4
★  1080 hd
★  ax pro
★  880
★  768
★  1080 hdtv
★  1080p projector
★  820
  x41
  1080 lcd
  playstation 4
  px21
  480
  xbox one
  1080 pixels
  1090
  dx11
  wii u
  1080 plasma

Your alternative for 720 is not listed? Suggest!
Speaking about 720, one probably shouldn't forget about milt rosenberg.

Other search terms related to 720 and their ratings are:
★★★★★ milt rosenberg
★★ chevy v6 engine
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Google Trends

Scale is based on the average worldwide traffic of 720 in all years. Click on graph for more.
720
1080p
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