New kid on the block?
They certainly are.
GSM operators have been fitting micro basestations everywhere for years, helped by the fact that GSM makes this relatively easy to do. For example there's one in almost every petrol station forecourt sign.
3G makes it a lot harder to do this - one of the major cockups in both the UMTS and CDMA standards. 3G network planning is said to be really hard to get right.
4G (LTE) apparently restores network planning to something like the simplicity of GSM, so it becomes easy to plonk 4G microcells everywhere. So I don't expect Cisco to be alone in this market, not by a long stretch...