I'd ridden Pirelli Motorcycle tyres for years, and in this time, it often struck me as odd that Pirelli hadn't jumped into the bicycle market.
They had both the technology as well as the established name so it seemed like a no brainer that they shouldn't enter the mix of current bicycle tyre brands and do well from the outset.
I'll be honest in saying that I had not heard that they were once event partner for the Giro Italia, but in my defence, this was in 1909.
So, it was with some interest that the news of Pirelli's subsequent return to the road racing scene was met by myself as well as other road riders.
Pirelli has paralleled their Iconic motorsport brand with the same name and livery.
As with many other premier tyre manufacturers, Pirelli has developed their own exclusive Silica based compound that they claim gives excellent grip whilst minimising rolling resistance. 

Pirelli’s current product offerings.

Pirelli P Zero: Silver logo

Dedicated road racing compound tyres. Replica "Diablo Corsa" pattern tread made famous on the premier range of Pirelli Superbike tyres. Sizes currently available.

700 x 23
700 x 25
700 x 28

Pirelli P Zero TT: Red logo

Time Trial Specific compound. Full slick top

Sizes currently available.

700 x 23
700 x 25

Pirelli P Zero 4 Seasons: Blue logo

Designed as a winter or wet weather race tyre. Deeper groove tread pattern.

Sizes currently available.

700 x 23
700 x 25
700 x 28

Currently there are no dates set for a release of a dedicated Tubeless version.
However, considering the swell in tubeless wheelsets now standard on new bikes for 2018, it would be surprising if Pirelli were not already looking to tap this market.
What about off road tyres?
Again, Pirelli has a wealth of experience and history in the offroad market so it would be suprising if this direction didn't feature in their plans.