Where would I be able to find out information about how long the JTX1 will be available for and be supported by NVIDIA? I am thinking about embedding the JTX1 in a commercial product, instead of going with an FPGA as originally planned.
Also, on a similar note, what is known about the successor of the JTX1?
Regarding the Jetson TX1 product lifecycle support, you could find the information from below page:
Is there any information on the successor of the JTX1 ?
Will the form-factor and the physical interface be the same as the JTX1?
That depends on the product requirement to implement, you could refer to those publish documents from download center:
Regarding TX1 base product, you could google them from the internet.