Battlefront will soon be releasing their new plastic bases with figure holes into general release. One of the more useful sets for me looks to be the Mixed Bases with Figure Holes (XX108). These bases are appearing in newer plastic and some metal figure sets. For the plastic sets they work perfectly, but some work is required to make them work for metal figures.
Thus far I've used these on a few metal miniatures, and while it took a little extra work to prepare the miniature before painting (so it would fit in the hole) it saved me time on the back end in basing the miniatures. The one issue I see is miniatures that are cast prone or otherwise on a large non-circular base. For those, you'll likely still need a few of the old style bases. However, given the end product is similar in thickness to a built up thin flat base the two should work well in combination.