Putting automatic emergency braking on a bike would be wildly dangerous and just completely stupid. When you have limited traction available it's often safer to steer around an obstacle instead of braking. Automatic braking would be likely to throw the rider off over the handlebars.
Garmin bike computers support turn signals with dual rear lights but I've never seen anyone use that feature. If you're turning near other traffic then you have to slow down anyway so sticking an arm out to signal isn't a problem.
A lot of riders already have multiple battery powered devices including bike computers, Di2 shifters, headlights, tail lights, power meters, radar, etc. But battery powered devices are expensive and heavy; many cyclists don't need or want some of them. Some people never ride at night and don't necessarily need lights. Bike computers and lights which support the ANT+ standard have automatic lighting.
The better bike computers have GPS tracking, anti-theft alarms, and support rear radars. Most bikes don't come with a computer because they're expensive and cyclists prefer to choose their own. If you buy a bike with accessories from a local store then they'll be happy to assemble everything for a nominal fee.
Garmin bike computers support turn signals with dual rear lights but I've never seen anyone use that feature. If you're turning near other traffic then you have to slow down anyway so sticking an arm out to signal isn't a problem.
A lot of riders already have multiple battery powered devices including bike computers, Di2 shifters, headlights, tail lights, power meters, radar, etc. But battery powered devices are expensive and heavy; many cyclists don't need or want some of them. Some people never ride at night and don't necessarily need lights. Bike computers and lights which support the ANT+ standard have automatic lighting.
The better bike computers have GPS tracking, anti-theft alarms, and support rear radars. Most bikes don't come with a computer because they're expensive and cyclists prefer to choose their own. If you buy a bike with accessories from a local store then they'll be happy to assemble everything for a nominal fee.
https://buy.garmin.com/en-US/US/p/698001