Right now I think we are moving to all new G-SHOCKS becoming Tough Solar and Waveceptor equipped. Just as EL illumination eventually became standard on pretty much all new Gs, I think it's only a matter of time before these features become cost effective enough to be manufactured into almost all watches in the range.
The one feature that remains limited to a very few variants, and which I would like to see standard is a vibrating alarm. I appreciate, having a small motor in a G is tricky, as it means moving parts and potentially increased fragility, but we've seen how this is now taken for granted on all but the cheapest cellphones. As someone who (a) often has difficulty hearing the tiny alarm beep on watches and (b) is always nervous about irritating those around me that can, I think this would be a great standard feature.
What do you reckon?