Can't say I'm surprised. The real surprise is that it has taken this long given how keen Hollywood is to maintain/reboot well-known blockbuster franchises these days. Even Blair Witch, also released in 1999, was given another shot lately, and The Mummy is about to get one as well (to say nothing of other franchises with big hits in 1999, not sure if anybody's heard of them, I think they were called Star Wars and Toy Story and Bond... Wild Wild West, not so much).
Anyway, as somebody who has not been excited by most of the Wachowski's post-Matrix work (I do still love the jelly bean high that is Speed Racer) but does still think the world of the Matrix is a pretty interesting one, I'm intrigued by the possibility of a reboot and of how modern day technological concepts are worked into it.
Then again, it all depends on who is going to be writing/directing/acting in it. I do hope that they can at least start by focusing on just one movie rather than trying to launch a multi-movie universe right from the get-go but that's probably quite inevitable.