In fact, if you check all the last Builds of Windows Phone 8.1 update 1 aka GDR1 have been incremental only. Build 8.10.14203.306 brought scheduling of updates and real-time updated Live Tile showing battery percentage. 8.10.14192.280 which tested critical update capability or 8.10.14176 before that which brought update error fixes and spread the update to HTC devices. The update version 8.10.14157 before that was incremental too.
Anyways, while new versions popping up not always confirm update roll out, but considering the above history of incremental WP8.1 GDR1 updates, it may be a good candidate of rolling out to dev preview devices, soon.
The OS Build 8.10.14226 is rolling out as part of Lumia 535 software update for APAC region and thus may be on the way soon to other devices too. But don’t expect it to bring anything new, as feature wise it looks similar to the latest dev preview update 8.10.14219.
Thanks Nuntawat S.
@nuntawat_s for the tip. Cheers!!