You'll only see LTE if an LTE radio is made that can do every band including bands not implemented yet. I think its possible but I also wouldn't bother waiting for it.
Nexus line will be a single device world phone from this point on. Unlike other phones have multiple versions for multiple regions.
I'm not so sure that will be the case. Google took too much criticism for not having LTE in a late 2012 "flagship" device. I think we will see LTE in the Nexus 5.
Could one of you, or anyone really, enlighten me on current cellular technology, especially in the US? I'm currently on Verizon and would love to use an unlocked Nexus on the network. It is my understanding that the LTE Verizon uses is GSM based hence, the SIM card. Why do GSM phones not work on Verizon then? Is is because Verizon uses different wireless bands for LTE or because the backup 3G on Verizon is still CDMA?
Is it also possible Google could include a wireless radio of supporting LTE on Verizon in the future? Any input would be greatly appreciated.