At the office here we use projectors in bigger rooms and 50ish inch 1080p tvs in smaller conf rooms. In HUGE rooms we have multiple mirrored displays ..
1080p sets don't look ideal/perfect when viewing non-native resolution, but it's always "good enough" for business meetings. 720p would be good enough as well.
Mount projector to ceiling, run cables along wall to "hot seat" where presenter sits, best to run cables under table and connect them to a junction box or something... that way, if the cables need replacing after a year or so of people plugging and unplugging things 20 times per day, you can simply replace the end cable, and you don't do all that extra wear and tear on the terminals on the projector...
Projectors often take like 15 mins between power down and next time they power on ... this may be an issue for a busy conf room...
If it's a big room that holds more than like 6 or 8 people, projector makes more sense. for small conf room, a couple of 50+ inch TVs is cost effective and practical option....