When I can say from my couch "Alexa, make me a steak, medium rare, and bring me a beer, IPA" and a robot hands me a beer in 1 minute and a plate with a hot steak 18 minutes later, I'll give a shit and I think other consumers will, too.
Reasonable enough. Other than the stock capabilities (weather, time, shopping list, timers, alarms, "what's playing at the movies?", "what's the phone number for Tire-Rama?", oodles of music sent to the theater system), the only third-party capabilities we use regularly are:
o Adjust the lighting via TP-Link smart plugs
o Adjust the heating / cooling via Sensi smart thermostat
o Check Fitbit stats / progress
Is it worth $49 or so out the door, plus hardware cost for associated devices to be able to do all this without having to otherwise go and do it? Well, it is to us.
For instance, sitting in the theater, it's either get up, make a 20 foot walk to the light switch, flip the switch, a 20 foot walk back in the dark, and sit down again, or just say "Echo, Turn off the lights." Likewise, when the show is over, it's just "Echo, Turn on the lights."
But when it'll cook a meal, see it delivered to the table, even see that the dishes are washed... yeah, that's going to be a fine day. At consumer prices, I'd hazard a guess that's still five or six years off.