The BBC News article Inmarsat lays big satellite order with Airbus says:
The firm is buying three new spacecraft to augment its Global Xpress system, which provides connectivity to on-the-move and out-of-the-way users, such as those on ships, planes and oil rigs.
European aerospace giant Airbus will build the satellites.
Inmarsat says their novel technologies will make it easier and faster to react to market developments.
For example, rather than taking up a "fixed" position in the sky, as is the case with all the company's current platforms, these new spacecraft will be designed with the expectation that they might have to move around to match demand.
Their telecommunications payloads will also be fully reconfigurable through software updates - not something that is generally practised today.
Is it unusual for satellites in GEO to move around in longitude to adjust to the geographical distribution of customer demand? Are there any current examples of this kind of activity, apart from an occasional one-off major repurposing?