Just ordered the Nexus 10 and would orde the Nexus 4 if it had LTE with AT&T without the hassle
i'm going to NYC in a couple weeks..should be a great experiment since i imagine i'll be on 3g/4g/hspa/whatever with tmobile while i'm there.
to be honest, 95% of the time i'm either at my house, starbucks or work and use WIFI (which also saves battery life) so LTE isn't really an issue for me. also tmobile is pretty fast.
i guess if your phone becomes your broadband/wifi exclusively and you want super fast download and want to use it to tether that makes sense..but honestly i dont use my phone that way..the battery would always be dead.
so when i'm in NYC which i imagine is pricey finding any WIFI i expect to be almost always on radio/3g/whatever for data so i'll be able to say if its an issue.