Perhaps it (any pc in the world) is an exaggeration, but I can use my phone, personal laptop, work desktop, work tablet, personal tablet to connect to my always

Perhaps it (any pc in the world) is an exaggeration, but I can use my phone, personal laptop, work desktop, work tablet, personal tablet to connect to my always running tmux session and pick up where I left of. And a virtual machine seems portable, but I cannot use it on my phone/tablet, and I also cannot use it on most other machines that don't have that virtualization software installed.