Besides analog, digital logic which relies on floating gate memory like EEPROM and Flash is limited to larger feature sizes. This applies to a lot of microcontrollers and some programmable logic. I think NOR Flash is just recently down to 28 nanometers?
There are all sorts of things which currently need larger geometries. For example, if your digital product must operate continuously and must have super low leakage, you can't use too fine a geometry. Quite a few fairly complex digital things fall into that category.