https://youtu.be/8fE0GR9prQE

The ultimate accessory for Genesis/Mega Drive. Complete FPGA recreation of the entire Mega-CD/Sega CD hardware into a plug and play Cartridge

World’s First Mega-CD/Sega CD FPGA Optical Disc Emulator

• Plays both ISOS (bin+cue) and ROMS
• RAM based cartridge for instant boot
• Compatible with all original and region free patched Mega-CD / Sega CD bios
• Supports Megadrive / Genesis, Sega CD / Mega-CD, Master System and 32X games (requires 32X add-on)

Fully Supports original Megadrive and Genesis hardware (Nomad included) 

• Fully compatible with Analogue Mega Sg!
• Easy to use interface for navigating your collection with screenshots, genre, year and description
• Save State support for Megadrive and Genesis Cartridge games (8 slots)
• Built in cheat engine for Megadrive and Genesis cartridge games
• Emulates all different Genesis / Mega Drive / Master System / 32x cartridge mappers.
• Stores all different Genesis / Mega Drive / Master System / 32x cartridge saves into microsd card.
• Per game Mega-CD / Sega CD Backup RAM and Cartridge RAM stored into microsd card
• Master System FM Core
• In-Game menu for fast reboot and swapping games (Genesis / Megadrive and Mega-CD / Sega CD)

Enhanced Mega Drive games with CD audio and Mega-CD / Sega CD hardware (MSU1 like)

• 400GB Exfat microsd supported"

Very interesting product but pricey for me, definately a market for this though.