What is the next mil rifle concept?

Not the bull pup which to me is a silly design.

I see nothing much has eventuated from the caseless ammo concept. If it was successfully done in practical terms, would be a huge change.

No need for an ejection port. Less debris and dirt, moisture etc entering the action.

If the cartridge was shorter the cyclic rate could be faster.

I have played around in my mind with the idea of future sci fi firearms, where the caseless ammo is bullet only, and no solid propellant but instead a small squirt of propellent gas or liquid fuel. The bolt would be very short, only needing to chamber a projectile. The cyclic rate could be a multiple of the current numbers.

PS Ripp thanks for posting the link.