The 7D will still work as it has since 1.2.5 in the meantime.
I don't expect miracles from the new firmware. The ability to set a maximum (auto) ISO figure is the only *new* feature that I'll probably use. Still, let's have it
5D3, 5D2, Sony α6000, G16 | SY14 f/2.8, 24 f/2.8, 35 f/2, Ʃ35 f/1.4A, 50 f/1.8 I, Ʃ50 f/1.4 EX, 100L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 2.0x III, 70-300L | E-mount: SY12 f/2, 35 F1.8 OSS, 16-70 ZA OSS, 55-210 OSS, SY 300 F6.3 ED UMC CS, MB Speed Booster and Canon FD(n) & FL lenses