Sentai Filmworks announced today that by 2019, they will have removed DVDs from their product lineup. The company will still be releasing DVDs for second or third seasons of titles that are already on DVD. They will also release older titles on DVD that do not have any existing Blu-ray materials. Future premium box-sets will contain Blu-ray only.
Sentai is currently running a related promotion where spending $299+ on products through their online store will net you a free Blu-ray Disc Player. This promotion is set to end on September 30th.