[Touch screen?]

I'm throwing in a couple of options, the 1st I've already done and the 2nd I'm considering:

1. An all-in-one desktop.  This is a monitor where all of the PC's components are inside of the monitor.  It doesn't make the monitor bigger/thicker, just a lot heavier due to the components.  I ran MFME on it and it responded well to the machine buttons.  Colour-matchine games like Bejewelled responded well on it too, originally designed for a mouse, and it kept up with the fast pace.  Sadly I lost it in 2015 and my house insurance replaced it with a normal desktop.  It's still an option for me again though if I was getting another new PC.

2. Monitor overlay.  Search for "touch screen overlay" and look for the right size and aspect for your monitor.  They clip on and run off a USB port.  My current monitor has a USB hub so I can just plug it in there for cable management.  Going to look for product reviews before I take the plunge though!

[Fruit Machines titled from computer games]

Unless there was a title called Space Invaders, I think the Space Invaders one was called Space Raiders.

Crystal Maze.

Take The Piece (chess).

Super Breakout.

[Most Succesful manufacturer ?]

As a casual, I agree with what Slasher wrote.  I had my ups and downs with £35 era and early £70 era (mostly £35-£70 conversions), but also managed numerous quick GATW boards.  Later £70s and £100 were a no-go for me.

As for most successful manufacturer (after JPM!) I would probably say Bell-Fruit.  That's because I've known of their presence throughout all of my playing days and BFM were the last one standing.  It seems to me that manufacturers post-BFM, like Reflex and Betcom were just a copy of a copy.

Going back to JPM - they are the same company as Sega.  I remember watching an old James Bond film from the 1960s.  You have the obligatory casino scene and their machines had Sega written on them.  In the 1990s, JPM made a fruit called Sonic The Hedgehog which fits as that is Sega territory.

[MFME 6.1 emus]

Reference Cloud 999's streak behaviour, I think it's because of the RAM file.  This is the machine's memory state which is cleared to factory default when you open the layout for the first time.  Like a real machine, it will go jackpot-crazy on your first session then it will play dead for a while.  The more you play it, the more it evens out as it trends towards its long-term payout percentage, and the RAM file remembers this.  This isn't specific to Cloud 999 though - it can apply to a lot of fruit machines on early plays.

[Wine for Wizard]

Real ale and gin for me