If they emerged from time travel in say.... 2006, their communicators wouldn't really seem all that out of place with all the cellphones out there. If they were in our current time, the iPads and tablets out there would seem of higher tech than some of the things we saw on TOS, and more on par with TNG tech.
Ha, so true. Our gadgets and technology would have probably looked FAR flashier and more advanced than anything Kirk's crew was using in that movie.
Save of course for the transporters and warp drive.