I think Google are actually really brave to do this and I for one am proud of them. Lots of corporate companies keep around products in zombie states for years because they are afraid of shutting stuff down and upsetting customers.
Google provides lots of free services and I think it's awesome that they try stuff, innovate and then pull out when it's not working for them.
I think it's good they gave everyone a month's notice and provided a txt based alternative. It would have been nice if they'd also pointed to some voice alternatives provided by "competitors" though.