https://www.engadget.com/tag/alexa2018/there's the article that covers what they actually announced.
For me, here's what caught my interest:
the wall clock. I've got a dumb one above my TV (the only actual clock in my house). If it could collate timer status from all the Alexa's that'd be double-handy, as odds are good we're watching TV while waiting for the oven or laundry to finish.
Guard: seems like a simple software upgrade to talk to my alarm company
Input: the stereo add-on. A lot of people bought Dots to connect to their sterero. This is even better than a Dot for that purpose.
Microwave: if I didn't have a working over-the-stove microwave, I'd give this a serious consideration to replace it.
Maybe For Some People Items:
Better Show: who doesn't want a bigger screen. We like the Show in our kitchen.
Echo Plus2: offline command support is a really big deal for some people. If this thing had z-Wave, I'd give it serious thought to replace my SmartThings hub when it dies. Maybe when the Echo+4 comes out?
Echo Auto: this is probably the smoothest way to add Echo to a car. Do I need it? No, I only listen to NPR in my car.
The Meh:
Smart Plug: these already exist and everybody has them. I do Z-wave only because it's a standard technology that talks to my hub.
Sub: the kind of person who needs a sub for music probably has a stereo and there's bluetooth, cable or the Input for that...
Ring camera: not sure how this is Alexa awesome