HDR, Dolby Vision and Object based codecs are supported by the 203 besides 4K. The OPPO website page for the 103 says it can output 4k X 2k. Myself I don't plan to upgrade to 4K until my current system implodes. At that point I will likely get whatever BDP is available in my price range. IMHO, I think OPPO sees the writing on the wall that the video processing for home theater is beyond the point where it is practical to keep building machines better than what they currently have.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner