Bonded T1 – Will it hurt TDM PRI board sales?

I notice a trend with businesses using Asterisk PBX. They are starting to opt for exclusive bonded T1 from their ISPs (or IPSPs) with SIP terminations for voice. This is in conjunction with separate bandwidth for data. Being in the same back plane of the termination provider and captive bandwidth to the termination provider does help VoIP call quality. The price of the bonded T1 does not seem any cheaper than ISDN PRI T1. The bonded T1 approach to SIP trunking dispenses the use of Digium or Sangoma TDM boards. Will this trend pose a serious problem to the volume of board sales in future? I hope this is not the case. After all, these TDM boards are what made Asterisk shine in the early days.