There are many new developers making games, utilities, new versions of languages, a GCC compiler patch to output 9900 code, a bunch of really cool modern hardware solutions including the TIPI that provides a modern hard disk and internet connectivity via a raspberry pi. and the F18A VDP replacement is on this and many other systems to get VGA out. more info: https://www.arcadeshopper.com/wp/ti-99-4a-faq/

check out another demo here by one of the coders of the megademo https://www.youtube.com/watch?v=Guv_Jp3m-vw this is video from my 99/4a screen real hw.. my boot menu is a gram device so it's a little different..

you are in luck they are available soon as I get the labels in also many other new TI-99/4a games, expansions etc including 32k if you don't already have it