That's possible, but also a big ask. The Wii had fad power, enabling it to sell to non-traditional audiences. That can't be underestimated. It's quite possible all three of the current console platforms will break 100 million if they're on the market long enough, but it's doubtful any of them will do it with essentially a single SKU like past consoles that broke that barrier did (and the only one who hasn't gone multi-SKU is the Switch, which of course hasn't been on the market long enough to worry about doing so).
Wii had three different hardware revisions, not counting pack-ins.
NES had two, SNES had two. Game Cube had two. I think N64 only had one unless you count funtastic models.
Game Boy classic two revisions. GBC one, GBA three. Three DS, and a whole bunch of 3DS models.
Genesis had three. Sony PS2 and PS3 each had multiple fats, slims, and super slims.
Sony PS4 Pro and Xbox 1X are an entirely new class of hardware, not just minor upgrades and/or cost cutting measures.
9th gen hardware is here with Switch / PS4 Pro, XB1X. Or is Switch 9th gen and the updated Xbox/PS4 still 8th gen, as Wikipedia would have people believe?https://en.m.wikiped...o_game_consoles
Will incremental upgrades of consoles mean the console industry is taking the PC/Mobile route, spelling the end of hardware generations? Switch is primed up for incremental updates with Tegra X2 in a couple years. And there will be a Switch 2 with full B/C.