And you will get that eventually, no doubt, but the ones out there now don't seem to be able to handle it, or at least handle it as well as people would expect.
Meanwhile i would much prefer and which Street guardian are also working on, a dual channel camera with 2 small cameras on a wire, and a main box you can hide in your car.
Still some drawbacks as you can not hide it too well as you will after all have to get at the sd card now and then as it is a model with no wifi.
So you need to be able to get hold of the SD card, and also once in a while do a in camera format of the memory card for good measure.
I would like that main box or be large enough to be able to hold a 2.5" harddrive instead of the SD cards, and i would like for it to be fireproof and be sturdy so i could bolt it up real good in the engine compartment if i wanted to.
And i would also like wifi if it could be done the right way, maybe with a external antenna as a car is like a Faraday cage blocking already weak signals from little wire antennas inside gadgets.
But i don't need auto upload to any cloud or a eventual home network as i would never in a million years use wifi at home.
Current systems if your car are parked at one end of your house, and your hole router are in the other end, and if your house are made from proper materials and not like some American houses just a wooden construction, well then getting the wifi to connect to the car all the way out there might be a problem.
Garmin i think it is do make satnavs with dashcams, problem is its a big unit and to have optimal conditions for camera you will have to place it on your windscreen where its probably not legal to have it.
I just use the sat nav i already have in the bloody phone i am "forced" to carry so my dear old sick mother can get a hold of me, but when she are gone so are the phone, and then i might need a sat nav unit.
My phone already dock in a cradle on my driver side door so it can get charge and i can use it hands free with bluetooth.
This is my current gadget deloyment consisting of phablet size phone - 7" tablet for NAV and so on - 3 cameras on windscreen ( at least ) and ifonly my cheap double DIN headunit worked fully NAV there too ( looking to upgrade headunit to antroid model )
And offcourse cameras in the other windows of my car too, cant be any other way when you do testing for some brands on dash and action cameras.