The majority will still have there HSPA networks in place as well. The one to go the way of the dodo in the next few years is standard GSM. even foreign countries ( the ones not interested in LTE anytime soon) are looking to ditch GSM in the near future and adopt HSPA as the ground floor standard.
Thanks for the informative posts, buddahbless. Helps this not-so-phoney guy make sense of his upcoming smart phone purchase. The limited local storage option (no SDcard) might keep me away from Nexus 4.