While you've probably been hearing a lot lately about the shiny new Versal devices and the Kria system-on-modules (SOMs), the 7 series lineup is the tried and true workhorse that is popular amongst customers in a broad range of markets such as automotive, medical, aerospace and defense, test and measurement, and industrial.
I've personally turned to the Artix-7 FPGAs for my tight-budget and low-power requirement designs such as a battery-powered hand-held software defined radio (SDR). The performance to cost ratio of the Artix-7 makes it one of my top choices for new projects that don't appear to immediately require the muscle of one of the UltraScale+ devices.
The Spartan-7 devices are the ideal option for those projects that eat up I/O. It's also a sigh of relief for those that just had to update their designs from the Spartan-6 to know that the new Spartan-7 will have a longer-yet lifecycle.
The Zynq-7000 SoC is hands down the FPGA device family I'd pick if I had to pick just one type of FPGA to use in the rest of the designs I ever work on. Having that Arm Cortex processor physically embedded in the programmable logic of the FPGA gives you the advantages of working in software (ie - dealing with floating-point numbers/arithmetic) right next to the advantages of working in hardware (ie - tight timing in the microsecond or nanosecond range).
Given that many of the 7 series devices have already been around for approximately 10 years, this announcement means that some devices will end up with at least a 20-year lifecycle. The Kintex-7 for example was introduced in 2011, so it'll end up with a 24+ year lifespan. Overall, whether you're a professional or a hobbyist, you can trust that your designs utilizing a 7 series device will be supported for at least the next 13 years through 2035.