Yea anything they can do to save on costs are gonna be crucial. Even though I'm not a fan of say the newer Honda's not having a physical volume knob I'm guessing there are a ton of people that would really prefer everything just be on one menu, certainly cleans up dash clutter. The HUD's I'm looking at appear to be a shared part between Mazda, Mini, and Rolls Royce funny enough. As a driver I just want my speed in my view or close enough, and with the DC motors there's no point in any other kind of gauge except maybe battery.
Model 3 is going to make or break on how it compares to other $35,000 new cars and what the unit break event point is. The Model 3 has a few main features going for it out of the gate: Performance, auto drive, cost of ownership including fuel, and brand appeal.
If the base model is really going to be able to do 0-60 in 6 seconds that's better than most optioned out mid-size sedans and blows almost all other EVs out of the water. If they can replicate the Model S Torque on demand feeling at the lower price point it's going to be a major driving factor for sales. If they really are auto-drive ready, that feature set sells itself. Barring massive regulatory bullshit it's gonna be a thing on most "luxury" cars in the next few years that aren't performance focused.
Even though the initial cost is gonna be higher than what most working class buyers would typically spend, the lack of required maintenance, fluids, and fuel requirements are the core selling points, although California is going to try it's damn hardest to make them unappealing via heavy taxes to make up for lost money on the soon to be doubled gas tax. Range issues are still going to persist until battery tech can charge way faster and last much longer. For most people it will be a non-issue, for anyone who travels long distances on the reg or even occasionally it's gonna be a turnoff.