My 2025 bike likely wouldn't be dramatically different, but if we're talking wish list enhancements (whether they're feasible in just 5 years or not) -- I'd like a much lighter ebike (as I currently choose to ride without my motor assist many times, depending on the objective and the weather. Just take my current ebike but drop it to the same weight as my '94 Bianchi, and I'd be oh-so-happy!) I'd like to see the next 5 years bring transformation in the frame and battery industries -- achieve major cost drops in carbon fiber (or other super-light-weight material) production, and in batteries -- plus improved battery tech of course. Also, have those 5 years simultaneously bring about a widespread cultural shift to increase prioritization of exponentially improved and expanded biking infrastructure...
For myself, I don't want or need anything beefier than the current Class 3 specs (my current ebike is Class 3) nor would I like to see anything higher (motor-propelled-speeds) than that introduced onto our current multi-user trail infrastructure here. (ie, anything approaching an 'e motorbike' mentioned earlier -- could be fine for vehicle road use -- but the MUT's here are nowhere near ready for that, nor designed for that, particularly if sustained 30mph-cruising-speed ebikes were adopted on large scale before those magical infra upgrades were (bwahaha!) finished.)
I love the idea of connectivity to my phone (for ride/battery/energy details, but probably not for operation of the bike.) No real interest in voice activation. And regen hasn't held much interest for me at this point; its one thing to capture the energy of a decelerating Tesla or other heavy vehicle; but the net gain doesn't seem significant enough to bother with when you're talking a bike and rider. (Though perhaps if I rode all my trips 100% with assist, I'd become more focused on wanting every possible mile between my charge cycles.)