HP Workspace apps are meant for business usage and are usually subscribed to by the business for their employees and clients. The businesses run legacy Windows apps through the cloud to the employees or clients. So they are running them remotely through a secure VPN into a virtualized desktop environment which is enabled via Continuum.
From
ZDnet
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HP Workspace
HP's three-in-one (phone, laptop, desktop) Elite x3 device ecosystem is complemented by a software component -- HP Workspace. Designed to facilitate access to virtualized, cloud-hosted enterprise apps (many of them originally written for Windows XP), HP Workspace is an app catalogue that authenticates to Active Directory, pulling up a tile for each of the apps to which the user has access. When the Elite x3 is docked, clicking on an app tile initiates a VPN session to the datacenter, bringing up the virtualized desktop app on the attached monitor (or Mobile Extender), where it can be driven by a keyboard and mouse (or touchpad).
HP has also partnered with leading CRM provider Salesforce to preinstall Salesforce1 on every Elite x3.
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From
Anandtech
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Continuum allows you to run your phone as a desktop PC, but the app selection is restricted to UWP apps which support Continuum. At the moment, that isn’t a huge selection, and you can’t natively run any Win32 apps. HP has a solution for this too, which is HP Workspace, which is an app catalog to let you access virtualized apps. App virtualization is not a new technology, so HP will leverage HP Workspace to use this existing tech and stream business apps to the phone. This is already a popular solution in business to get line of business apps out to mobile devices like tablets and phones, and HP’s version has full support for Continuum.
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From
PhoneArena
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So what does built for business mean when we speak about the HP Elite x3? Frist, the phone supports HP Workspace, an app catalog made by HP to provide access to virtualized apps. HP Workspace creates a virtual PC, so that users have access to company curated catalogs of x86 apps via a virtualized solution.
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From
Windows Central
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Can it run classic Windows desktop apps?
Yes and no. The Elite x3 is still a Snapdragon 820 processor, and it cannot run Win32 apps directly. Instead, it is limited to just apps from the Windows Store.
However, and this is the big deal here, HP has enabled software virtualization so that companies can take their legacy desktop apps and run them through the cloud to the HP Workspace software on the Elite x3. As a result, when companies run the Elite x3 in Continuum mode they can run virtualized desktop apps remotely but securely.
This ability makes the Elite x3 close enough for businesses as an all in one device. It has the security and strength through Citrix and Salesforce plus onboard enterprise-level VPN to let IT departments manage the devices remotely.
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Hope this helps explain things