Honestly it looks good but it doesn't look to be really any better than anything already out there. Granted I haven't used it yet but judging by your wite's feature list and screenshots it seems like just another, generic ToDo list.
I certainly don't want to discourage you; I honestly haven't found a good ToDo list that does exactly what I want it to do either. But it's such a saturated market I'm convinced you either need to have insane publicity or a new, novel way of dealing with lists to be moderately successful.
> Earlier this year, Microsoft announced that they will retire Wunderlist, likely in 2017.
I wouldn't be so sure Microsoft is going to retire Wunderlist in 2017. The only quote I can find from Microsoft regarding the timeline is:
> "incorporated the best of Wunderlist into To-Do."
Considering Wunderlist's insane popularity I honestly doubt they will ever completely shut it down...at least in any short term time frame. Sure they shut down Sunrise roughly a year after purchasing it but that simply displayed data from other services better; Wunderlist has its own cloud storage with a huge amount of data. That's not an easy switch for users.
I wish you luck but I am highly skeptical on their Wunderlist shut down.