Correct me if I'm wrong but didn't Alton Towers used to have some form of virtual queue system in the late 90's/ early noughties? I think I remember reading about it somewhere.
In terms of virtual queuing in other parks I always thought the Disneyland Paris system works quite well. Every time I've been you usually see quite al ot of British tourists crowing round the machines amazed at this concept of a free Fastrack *sort of*, especially with us Brits used to parks like Alton Towers up charging for skipping the queue. I think when virtual queuing is optional and seems a benefit to the average person who's bought a theme park ticket for the day it works. I don't know if this is just because I am an enthusiast, but I always feel as though there is a negative perception of fastrack- that those people don't have to queue because they've paid more than us, creating a them and us attitude. I always vividly remember when the Smiler reopened after the crash- a lot of us had queued from the early on to get in the first few trains and there was a collective boo when the fastrack queue got released before the main queue to go up the stairs. If you give everyone like a fastrack through virtual queueing it puts everyone on a more even keel. However, I can't really see Towers scrapping paid fastrack anytime soon- particularly with the current financial situation.
If they do implement it this season I can imagine they'll use the app-I found this on the app developers website
https://attractions.io/covid-19 - and it will be for social distancing purposes. Even though I think by the end of the season they had worked the social distancing out more- there were still issues- for example the Smiler queue seemed to be a big issue- getting everyone in the pit to obey social distancing sounded like a right headache for the ride ops- many of which had to shout over the tannoy every ten mins to remind people to stand apart. Open and closing the queue as well seemed like a faff- whereas I guess with a Virtual queue in theory you would have less people in the pit.