Conferencing, still. You'd think that we had gotten that covered now, but nope.
Not just image and audio quality, but Google Hangouts on my phone (so I can carry it around the house and get tea etc during a meeting) slurps up oodles of battery and the phone (OnePlus 5T) gets really really hot too.
No such problem with eg. Netflix and Youtube, guess those video codecs have some HW acceleration while Google Hangouts doesn't?
Further: I only work some 500km from the office, so I travel there (mostly by train) roughly once a month for a few days. Good mix of remote and on-site for me.