The future will definitely be playack from smart phones or iPads directly to your tv. This is already possible but to where its commonplace is years away.
People know physical media and most aren’t familiar with technology at all so disc based distribution will be around many years.
There are outboard ‘players’ like the Western Digital which plays just about any file there is over an HDMI
You’ll have to give what your clients wants ….and right now that’s DVD and BD. If a client requesst another form, you need to deliver
Offer several options like download links or digital copy