GlobalProtect has been around since 2012 and has received many updates and new features except for the interface, which has stayed the same up until now: In GlobalProtect 4.1 the splash screen and settings menu have a nice facelift and a more friendly look.
Left: Mac OSX in 'always-on' mode, right: Windows 10 in 'on demand' mode
When you access the settings
One of the new features you'll see immediately is the ability to add portals!
This will allow you to connect to multiple different customers, partners or suppliers without changing the portal address each time, as you did before. GlobalProtect 4.1 is backwards compatible to PAN-OS 7.1, so your contacts do not need to upgrade to PAN-OS 8.1 right away to be able to receive your connections.
Another new 'feature' introduced in 4.1 is the availability of a GlobalProtect Linux client, currently supported on Ubuntu 14.04 and later, RHEL 7.0 and later, and CentOS 7.0 and later. It supports user-logon and on-demand connection methods, and it is capable of split tunneling and SSL and IPSec connections.
The Linux client can be downloaded from the Support portal Software Updates page.