Up until recently I worked for a travel IT company called Amadeus so very much at the sharp end of travel technology, especially airlines/airports, although most of it probably invisibly behind the scenes for the majority of travellers.
Personally, things like online ticket purchase, mobile check in, e-boarding cards, Uber (or Blacklane if I'm feeling indulgent
), online banking (and Paypal), Google maps, AirBnB (the list goes on) make travel just so much easier these days. I've had Bagtag eTags on my cases for several years so I can even check in my cases from home (I still need to carry them to the airport though). And Tripit manages my itinerary automatically.
Much more is coming, driven in part by the pandemic - things like touchless airports, disruption management systems, mobile passports/visas...
Many years ago I set myself a challenge of spending a week in London (I was living in Germany at the time) without using any cash whatsoever. It used to be quite difficult, especially on public transport. Then came along things like Oyster (pre-paid cards which you could load up and use to pay on Tube, bus etc). These days the Oyster card is losing ground to mobile phone (Apple Pay, Googe Pay) and every shop accepts it too. Even Big Issue sellers take contactless payments now!
Now a week in London without cash is incredibly easy - all you need is your phone. Many cities (Copenhagen springs to mind as I've visited recently) are reluctant to even accept cash on public transport, nor in most shops.
Funnily enough, despite Amadeus being based near Munich, Germany was one of the worst places for technology. It's a very fiscally-conservative society, especially in Bavaria. My local bar was cash only, not even accepting debit cards. To use a credit card you had to travel into Munich centre , and even then it was mostly tourists using them! But the pandemic quickly forced people to stop handling cash, and seemingly overnight supermarkets and shops switched to touchless payment methods (but still not credit cards!)
But I embrace all travel technology - bring it on 