Skating Treadmills??

[Query]

For your amusement!

Some hockey trainers have been pushing the latest expensive training equipment: Skating Treadmills. ??

They have rolling synthetic ice surfaces, that can be set at an incline.

  https://www.youtube.com/watch?v=r3WqQADH61I
  https://www.youtube.com/watch?v=KqSJf-Qiegw
  https://www.youtube.com/watch?v=reQ0DBzFlDE
  https://www.xhockeyproducts.com/hockey-facility/skating-treadmills.html
  http://www.kevinneeld.com/the-truth-about-blade-skating-treadmills/

An inline speed skater (notice the full outside-to-inside-edge-roll.)
  https://www.youtube.com/watch?v=BSkzm_qHsDg

I only found one video of a figure skater on a treadmill:
  https://www.youtube.com/watch?v=TWgypQKmt9E

Some non-treadmill figure skate training:
  https://www.youtube.com/watch?v=Yf1xOmEkz5c (including davis & white)
  https://www.youtube.com/watch?v=Wuulccawrgk
  https://www.youtube.com/watch?v=dJADtfJDXbU (some people can use skate spinners?)