Article by the Visual Capitalist, based on data by UK market research firm Pelham Smithers
https://www.visualcapitalist.com/video-game-industry-revenues-by-platform/
It kinda sucks that my favorite format, handheld is so low compared with the other hardware (yeah, I’m not considering mobile as handheld lol).
I suppose you could argue that pre-installed games still counts as part of the market. Not sure how you’d could the value though. Like a small part of the phone cost?
Otherwise the earliest store/system seems to be i-mode in 1999.