@colinwalker I think a lot will depend on how much maintenance your hair needs, or for that matter how much hair you still have. I've been running a shaver over my entire head for over a decade now, as early receding hairline and white hairs made that my preferred style. :) I think hairdressers will still be required for styling, but for basic trimming and hair care I suspect the home option will become the default. Not just on cost grounds, but convenience and time-saving.
@wearsmanyhats Good point about styling. Still makes me wonder about the overall impact on the profession. I've joked for years that there will always be a need for hairdressers, doctors and undertaker's but how much for the former remains to be seen. There seem to be far too many hairdressers on the average high street — they have taken over with nail bars, charity shops and betting shops — maybe that will change.
@colinwalker I’ve been cutting our kids hair for the last year and recently attempted my own. It went fine. Fine enough that unless we have something important (wedding, etc) I can probably maintain it myself.