Could be usable as DOS card in PCI-only build.
Really depends on your resources/situation. One of these could be most useful in a PC with no AGP and nasty integrated video eating memory bandwidth, such as i810, SiS530/540/630/PLE133 chipsets. It would perform similarly to a TNT2 PCI, i.e. good enough not to be a bottleneck in DOS, but if you want serious Windows/DirectX stuff you need a better card. So only useful for a DOS system where the performance impact of UMA/shared memory VGA actaully matters.
Then again, one of the great luxuries with retro stuff is that performance doesn't have to matter - compared to new stuff it's all glacially slow anyway, and if you need a faster system, you just use a slightly less old one. So nothing stops you from building a period-correct crappy low-end system. For a short while I tried to combine as many buggy oddities as possible in one system - i820 chipset with MTH and SDRAM, Savage2000 AGP, too-hot P3-600B etc. Until I decided I had better things to do with my time 😉