An older business application can still do its job perfectly well while becoming awkward to distribute. An accounting package, scheduling tool or internal database may need to stay on a Windows server, yet users now expect to reach it from home, another office or a browser without installing the full application on every machine.
For developers and hosting teams, that creates a different problem from building a new web app. The question becomes how to keep the existing software centralised while giving authorised users practical remote access. Application publishing and remote desktop delivery can provide that bridge without forcing an immediate rebuild.