It has been in Early Access for a while - probably 6 months or so. EA is a select group of owners who essentially beta test new software and provide feedback, and are also under NDA. Nonetheless, videos and information trickles out, as you see on YouTube. Based on these videos, Enhanced Summon is steadily improving, but will (should?) still be weeks (or months) before wide release.
They need to get it right. Too much can go wrong in a parking lot.