Considering Roamio Plus on Fios and have questions

I have never owned a Tivo but am considering a Roamio Plus to replace my current Verizon Fios "whole house" DVR. While everyone says I'll gain a lot, my questions include:

1. What Fios features/functions will I lose?

2. Is 3D supported? I often order VOD in 3D.

3. This is going to sound stupid, but I've gotten really spoiled by CallerID on screen. It's a safe bet I'll lose this, right?



Thanks for any info you can provide!