Yes, I will buy 5e when it comes out.
After all... I bought AD&D following my purchase of the Red Box, Blue Box and Cyan Box of D&D... I bought AD&D 2e following my purchase of AD&D... I bought 3e... I bought 3.5e... and I bought 4e.
I like the D&D brand in all its permutations... and it doesn't matter what kind of game it is, or whether I'm still playing any particular previous version when the new one come out. I enjoy supporting the brand. Same reason why I purchased M&M first and second editions, Paranoia and Paranoia XP, and Warhammer 40K 3rd, 4th & 5th editions.
I like reading new games, even if I'm still playing old ones.
After all... I bought AD&D following my purchase of the Red Box, Blue Box and Cyan Box of D&D... I bought AD&D 2e following my purchase of AD&D... I bought 3e... I bought 3.5e... and I bought 4e.
I like the D&D brand in all its permutations... and it doesn't matter what kind of game it is, or whether I'm still playing any particular previous version when the new one come out. I enjoy supporting the brand. Same reason why I purchased M&M first and second editions, Paranoia and Paranoia XP, and Warhammer 40K 3rd, 4th & 5th editions.
I like reading new games, even if I'm still playing old ones.