You can now get a 100" TV for less than $2,000. While I wouldn't go bottom fishing by cost, there are a large number of 100" screens available from everywhere from Costco to Best Buy.
Every time I looked at projectors the sharpness was way prevented me from going that way. Since then I have just upgraded the size. So, unless you have an auditorium you can get a tack sharp LCD or OLED screen. They are now practically paper thin (well, not that thin yet... but incredibly thin).