We have EMTs in our ER too, and they help out a lot with doing EKG's, drawing labs, splinting, wound care, assisting during suturing, transporting pts, etc...
We have EMT-Ps as well, and they do the same, as well as monitored transports and some ACLS skills.
The key as the RN is to know what's going on with your pts, and know the EMT. Many of our EMTs and other non-EMT techs are in nursing school
or PA school, and are pretty good. You have to know your pts, and know when it's appropriate for a tech to care for them, or when you'd better be the one with them.
But I'm not saying hospitals should hire EMTs as replacements for nurses...I'm very much against it. It works well when EMTs are there to supplement the nsg staff, but they can't take the place of nursing.
I got my EMT certification in high school and I learned so much more, and had so much more hands-on experience in nursing school, that what I know now doesn't even compare to what I knew then...I would not have been able to give competent primary care to ER pts with just an EMT certification.