I found the announcement very misleading. It clearly says "Why keep an expensive landline around, if a VoIP line will do the job? ". Nothing ambiguous about that, they are saying that you can get your alarm system to work via VoIP.
Then the example they give says "3. For example: SP1 with Google Voice". As we all know, GV is not a VoIP provider.
There is not enough money in the world for me to trust my alarm system monitoring to a GV line. In addition, many alarm monitoring centers have issues utilizing a VoIP line even when the communication protocols are altered, as in this case.