You are right there is drawbacks with current dashcams, reflections in the windscreen is one of the major ones as in the right unfortunate circumstances can make a good capture hard to get.
Offcourse you can fight this with a CPL filter or a dashmat, but both of those are not optimal but just what is available right now.
On the other hand having the camera on the outside it is also problematic, dirt can get on it, and just 1 splattered bug the wrong place and you are "recording blind"
On the windscreen you will see that big bug splattered out all over the place and can stop and get it off if the wipers cant handle it, with a camera you cant see you will drive on and not discover the problem.
Offcourse if you have a preview running on your phone you will see the bug on the camera on the roof, but i really cant be bothered with all that stuff running in my car and remembering to crank up the app and what not ( dont use apps in any form on my phone )
Cloud storage is also somthing that have been requested in here often, but it boil down to cell coverage, and even here in Denmark thats a small country with allright 3 & 4G coverage you can easy be in a place where you only have 1 or 2 G coverage.
Also the data generated by dashcams is pretty much around 400 MB for each 3 minutes of driving and this is just 1080/30, and that would eat up my 15 Gb dataplan in no time.
Offcourse i could get a mobile dataplan thats more Gb than my plan for my phone, but thats a whole other pricerange that i cant afford right now, and i think even if i was well and working i would not get such a plan, and i will ditch my cellphone when i can, ATM i am forced to have a phone but i dont like them.
Encrypted footage is also somthing ppl have asked for, this i think is somthing that can be done right here and now.
PT i am hoping for:
Much more light sesnetive sensors, what we have now is not good for anything but bright sunshine, as soon as there is grey skies above and you add a little speed you can forget all ambout capturing a small thing like a licenceplate.
Really the minimum exposure time for any of the frames in the footage must be 1:500 second or faster, and today dashcams drop to the slow 1:30 second resulting in massive motion blur in low light.
I would love a secondary camera in my windscreen and it should be flir, if it could warn about dangers on or along the road like in high end cars it would be nice.
And now we are at the fjew "smart" things i would like then ANPR i would like too, so i could enter the plate numbers of all undercover cop cars here so they cant catch me by suprice ( not that i really need it as i pretty much drive with the specs of the Danish traffic code )
Hidden main unit with a HDD or SSD for storage, transferring data by wifi or plug in USB key when i get home or need any data for my youtube channel.
For side and rear cameras i would like some ultra small ones, dont have to be really light sensetive as i see these angles as secondary, the front camera should be enuff to prove i am driving like i should so what ever go down must be blamed on the other guy.
Things rarely go to court here, for that to happen some one will have to die at least, and if thats not the case the insurance companies will duke it out among them self.
If there was to be any 3-4-5G in my dream camera it would just be for me to track the ( stolen ) car via the GPS in it. but i doubt any one would steal my small cheap ass Suzuki car.
Sorry if i am raining on your parade