I'm impressed to see that Elite Systems are still in business (running since 1984). They released some pretty great games over that era, and seems they're still making games (mobile these days, as you'd expect).
Interestingly, they are looking at producing a Bluetooth "ZX Spectrum" keyboard device, and not only operate as a ZX Spectrum with their mobile ZX game releases but as a bluetooth keyboard itself if needed. If you're curious:
http://bluetoothzxspectrum.elite-systems.co.uk/index.php