The whole home theater thing centered around projectors is dead. Uses far too much space and kills any flexibility with room arrangement (you've probably only got one large wall without windows/doors in each room).
3. You're wrong.
I snipped the rest of Saint's comments and left the important one

Anyone who thinks a 55" TV is the future of "home theater" can't have experienced the real deal. The photo below is to scale.
My opinion is that if one is going to go through the effort to make a full-scale replica of a speeder, you might as well make it feel like you are really traveling on one. The more image in your field of view, the more convincing the experience is going to be, and there's no better way to achieve this than a projector. As for brightness and "washout", there are ways to address this. Brightness is relative to the output of the projector, image size, optical configuration and the distance of the projector from the screen. Ultimately, you would probably want a projector with about 2000 lumens, and a minimum distance and corresponding image size suitable for your room and application. You can enhance contrast in a lit room by not using a bright white screen. A more neutral tone will mute the brightness a bit, but give you darker "blacks". The thing to keep in mind is that the blacks will never be darker than the screen reflectivity (gain) times the light bouncing off it. So, some light control will be beneficial. Simple things, like shading light sources to prevent direct bounce off the screen, can make a big difference.
One of my future projects is a steering wheel, pedals and a bucket seat, bolted to a platform which can be wheeled out in front of the screen when I want to use it. The same could be done with the speeder.